diff --git a/mindspore/core/ops/log_softmax.cc b/mindspore/core/ops/log_softmax.cc
new file mode 100644
index 0000000000..eb31b486f9
--- /dev/null
+++ b/mindspore/core/ops/log_softmax.cc
@@ -0,0 +1,62 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ops/log_softmax.h"
+#include <string>
+#include <algorithm>
+#include <memory>
+#include <set>
+#include <vector>
+#include "ops/op_utils.h"
+#include "utils/check_convert_utils.h"
+#include "abstract/primitive_infer_map.h"
+
+namespace mindspore {
+namespace ops {
+void LogSoftmax::set_axis(const int64_t axis) { this->AddAttr(kAxis, MakeValue(axis)); }
+
+int64_t LogSoftmax::get_axis() const { return GetValue<int64_t>(GetAttr(kAxis)); }
+
+void LogSoftmax::Init(const int64_t axis) { this->set_axis(axis); }
+
+abstract::ShapePtr LogSoftmaxInferShape(const PrimitivePtr &primitive, const std::vector<AbstractBasePtr> &input_args) {
+  MS_EXCEPTION_IF_NULL(primitive);
+  auto LogSoftmax_prim = primitive->cast<PrimLogSoftmaxPtr>();
+  MS_EXCEPTION_IF_NULL(LogSoftmax_prim);
+  auto op_name = LogSoftmax_prim->name();
+  auto axis = LogSoftmax_prim->get_axis();
+  auto in_shape = CheckAndConvertUtils::ConvertShapePtrToShape("input_shape", input_args[0]->GetShapeTrack(), op_name);
+  auto rank = SizeToLong(in_shape.size());
+  CheckAndConvertUtils::CheckInRange<int64_t>("axis", axis, kIncludeLeft, {-rank, rank}, op_name);
+  return std::make_shared<abstract::Shape>(in_shape);
+}
+
+TypePtr LogSoftmaxInferType(const PrimitivePtr &prim, const std::vector<AbstractBasePtr> &input_args) {
+  if (std::any_of(input_args.begin(), input_args.end(), [](const AbstractBasePtr &a) { return a == nullptr; })) {
+    MS_LOG(EXCEPTION) << "nullptr";
+  }
+  const std::set<TypePtr> valid_types = {kFloat16, kFloat32};
+  return CheckAndConvertUtils::CheckTensorTypeValid("x", input_args[0]->BuildType(), valid_types, prim->name());
+}
+
+AbstractBasePtr LogSoftmaxInfer(const abstract::AnalysisEnginePtr &, const PrimitivePtr &primitive,
+                                const std::vector<AbstractBasePtr> &input_args) {
+  return std::make_shared<abstract::AbstractTensor>(LogSoftmaxInferType(primitive, input_args),
+                                                    LogSoftmaxInferShape(primitive, input_args)->shape());
+}
+REGISTER_PRIMITIVE_C(kNameLogSoftmax, LogSoftmax);
+}  // namespace ops
+}  // namespace mindspore
diff --git a/mindspore/core/ops/log_softmax.h b/mindspore/core/ops/log_softmax.h
new file mode 100644
index 0000000000..ad6bef4417
--- /dev/null
+++ b/mindspore/core/ops/log_softmax.h
@@ -0,0 +1,47 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_CORE_OPS_LOG_SOFTMAX_H_
+#define MINDSPORE_CORE_OPS_LOG_SOFTMAX_H_
+
+#include <map>
+#include <vector>
+#include <string>
+#include <memory>
+#include "ops/primitive_c.h"
+#include "abstract/abstract_value.h"
+#include "utils/check_convert_utils.h"
+
+namespace mindspore {
+namespace ops {
+constexpr auto kNameLogSoftmax = "LogSoftmax";
+class LogSoftmax : public PrimitiveC {
+ public:
+  LogSoftmax() : PrimitiveC(kNameLogSoftmax) { InitIOName({"x"}, {"output"}); }
+  ~LogSoftmax() = default;
+  MS_DECLARE_PARENT(LogSoftmax, PrimitiveC);
+  void Init(const int64_t axis = -1);
+  void set_axis(const int64_t axis);
+  int64_t get_axis() const;
+};
+
+AbstractBasePtr LogSoftmaxInfer(const abstract::AnalysisEnginePtr &, const PrimitivePtr &primitive,
+                                const std::vector<AbstractBasePtr> &input_args);
+using PrimLogSoftmaxPtr = std::shared_ptr<LogSoftmax>;
+}  // namespace ops
+}  // namespace mindspore
+
+#endif  // MINDSPORE_CORE_OPS_LOG_SOFTMAX_H_
diff --git a/mindspore/lite/nnacl/fp16/log_softmax_fp16.c b/mindspore/lite/nnacl/fp16/log_softmax_fp16.c
new file mode 100644
index 0000000000..c75362a331
--- /dev/null
+++ b/mindspore/lite/nnacl/fp16/log_softmax_fp16.c
@@ -0,0 +1,91 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "nnacl/fp16/log_softmax_fp16.h"
+#include <math.h>
+#include <float.h>
+#include "nnacl/fp16/softmax_fp16.h"
+#include "nnacl/fp16/exp_fp16.h"
+
+void LogSoftmaxLastAxisFp16(const float16_t *src, float16_t *dst, float16_t *exp_data, int batch, int channel) {
+  SoftmaxNormFp16(src, dst, batch, channel);
+  ExpFp16(dst, exp_data, batch * channel);
+  int cur_batch_offset = 0;
+  for (int i = 0; i < batch; i++, cur_batch_offset += channel) {
+    float16_t sum = 0;
+    int j = 0;
+#ifdef ENABLE_NEON
+    float16x8_t sum8 = vdupq_n_f16(0);
+    int count = (channel / C8NUM) * C8NUM;
+    for (; j < count; j += C8NUM) {
+      sum8 = vaddq_f16(sum8, vld1q_f16(exp_data + cur_batch_offset + j));
+    }
+    sum = sum8[0] + sum8[1] + sum8[2] + sum8[3] + sum8[4] + sum8[5] + sum8[6] + sum8[7];
+#endif
+    for (; j < channel; j++) {
+      sum += exp_data[cur_batch_offset + j];
+    }
+    for (int k = 0; k < channel; k++) {
+      dst[cur_batch_offset + k] = dst[cur_batch_offset + k] - log(sum);
+    }
+  }
+}
+
+// output = (input - reduce_max(input, axis)) - log(reduce_sum(exp(input - reduce_max(input, axis)), axis))
+void LogSoftmaxFp16(const float16_t *input_ptr, float16_t *output_ptr, float16_t *sum_data,
+                    SoftmaxParameter *parameter) {
+  int axis = parameter->axis_;
+  int n_dim = parameter->n_dim_;
+  int *input_shape = parameter->input_shape_;
+  int inner_size = 1;
+  int outter_size = 1;
+
+  for (int i = 0; i < axis; i++) {
+    outter_size *= input_shape[i];
+  }
+  for (int i = axis + 1; i < n_dim; i++) {
+    inner_size *= input_shape[i];
+  }
+  for (int i = 0; i < outter_size; i++) {
+    int outter_offset = i * input_shape[axis] * inner_size;
+    int sum_outter_offset = i * inner_size;
+    for (int k = 0; k < inner_size; k++) {
+      int inner_offset = outter_offset + k;
+      float16_t max_data = input_ptr[inner_offset];
+      sum_data[k + sum_outter_offset] = 0;
+      for (int j = 0; j < input_shape[axis]; j++) {
+        int axis_offset = inner_offset + j * inner_size;
+        max_data = max_data > input_ptr[axis_offset] ? max_data : input_ptr[axis_offset];
+      }
+      for (int j = 0; j < input_shape[axis]; j++) {
+        int axis_offset = inner_offset + j * inner_size;
+        output_ptr[axis_offset] = input_ptr[axis_offset] - max_data;
+        sum_data[k + sum_outter_offset] += exp(output_ptr[axis_offset]);
+      }
+    }
+  }
+  for (int i = 0; i < outter_size; i++) {
+    int outter_offset = i * input_shape[axis] * inner_size;
+    int sum_outter_offset = i * inner_size;
+    for (int j = 0; j < input_shape[axis]; j++) {
+      int axis_offset = outter_offset + j * inner_size;
+      for (int k = 0; k < inner_size; k++) {
+        int inner_offset = axis_offset + k;
+        output_ptr[inner_offset] = output_ptr[inner_offset] - log(sum_data[k + sum_outter_offset]);
+      }
+    }
+  }
+}
diff --git a/mindspore/lite/nnacl/fp16/log_softmax_fp16.h b/mindspore/lite/nnacl/fp16/log_softmax_fp16.h
new file mode 100644
index 0000000000..5485ca7f6a
--- /dev/null
+++ b/mindspore/lite/nnacl/fp16/log_softmax_fp16.h
@@ -0,0 +1,35 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_LITE_NNACL_FP16_LOG_SOFTMAX_FP16_H_
+#define MINDSPORE_LITE_NNACL_FP16_LOG_SOFTMAX_FP16_H_
+
+#include "nnacl/op_base.h"
+#include "nnacl/softmax_parameter.h"
+#ifdef ENABLE_NEON
+#include <arm_neon.h>
+#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+void LogSoftmaxLastAxisFp16(const float16_t *src, float16_t *dst, float16_t *exp_data, int batch, int channel);
+void LogSoftmaxFp16(const float16_t *input_ptr, float16_t *output_ptr, float16_t *sum_data,
+                    SoftmaxParameter *parameter);
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // MINDSPORE_LITE_NNACL_FP16_SOFTMAX_FP16_H_
diff --git a/mindspore/lite/nnacl/fp16/softmax_fp16.c b/mindspore/lite/nnacl/fp16/softmax_fp16.c
index b62bdd7f9f..31c44ad268 100644
--- a/mindspore/lite/nnacl/fp16/softmax_fp16.c
+++ b/mindspore/lite/nnacl/fp16/softmax_fp16.c
@@ -110,6 +110,7 @@ void SoftmaxFp16(const float16_t *input_ptr, float16_t *output_ptr, float16_t *s
     for (int k = 0; k < inner_size; k++) {
       int inner_offset = outter_offset + k;
       float16_t max_data = input_ptr[inner_offset];
+      sum_data[k + sum_outter_offset] = 0;
       for (int j = 0; j < input_shape[axis]; j++) {
         int axis_offset = inner_offset + j * inner_size;
         max_data = max_data > input_ptr[axis_offset] ? max_data : input_ptr[axis_offset];
diff --git a/mindspore/lite/nnacl/fp16/softmax_fp16.h b/mindspore/lite/nnacl/fp16/softmax_fp16.h
index 5ff3a1c02c..2c2b575d92 100644
--- a/mindspore/lite/nnacl/fp16/softmax_fp16.h
+++ b/mindspore/lite/nnacl/fp16/softmax_fp16.h
@@ -25,6 +25,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+void SoftmaxNormFp16(const float16_t *src, float16_t *dst, int batch, int channel);
 void SoftmaxFp16(const float16_t *input_ptr, float16_t *output_ptr, float16_t *sum_data, SoftmaxParameter *parameter);
 void SoftmaxLastAxisFp16(const float16_t *src, float16_t *dst, int batch, int channel);
 #ifdef __cplusplus
diff --git a/mindspore/lite/nnacl/fp32/log_softmax_fp32.c b/mindspore/lite/nnacl/fp32/log_softmax_fp32.c
new file mode 100644
index 0000000000..8d46d1557a
--- /dev/null
+++ b/mindspore/lite/nnacl/fp32/log_softmax_fp32.c
@@ -0,0 +1,89 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "nnacl/fp32/log_softmax_fp32.h"
+#include <math.h>
+#include <float.h>
+#include "nnacl/fp32/softmax_fp32.h"
+#include "nnacl/fp32/exp_fp32.h"
+
+void LogSoftmaxLastAxis(const float *src, float *dst, float *exp_data, int batch, int channel) {
+  SoftmaxNorm(src, dst, batch, channel);
+  ExpFp32(dst, exp_data, batch * channel);
+  int cur_batch_offset = 0;
+  for (int i = 0; i < batch; i++, cur_batch_offset += channel) {
+    float sum = 0;
+    int j = 0;
+#ifdef ENABLE_NEON
+    float32x4_t sum4 = vdupq_n_f32(0);
+    int count = (channel / C4NUM) * C4NUM;
+    for (; j < count; j += C4NUM) {
+      sum4 = vaddq_f32(sum4, vld1q_f32(exp_data + cur_batch_offset + j));
+    }
+    sum = sum4[0] + sum4[1] + sum4[2] + sum4[3];
+#endif
+    for (; j < channel; j++) {
+      sum += exp_data[cur_batch_offset + j];
+    }
+    for (int k = 0; k < channel; k++) {
+      dst[cur_batch_offset + k] = dst[cur_batch_offset + k] - log(sum);
+    }
+  }
+}
+
+// output = (input - reduce_max(input, axis)) - log(reduce_sum(exp(input - reduce_max(input, axis)), axis))
+void LogSoftmax(const float *input_ptr, float *output_ptr, float *sum_data, const SoftmaxParameter *parameter) {
+  int axis = parameter->axis_;
+  int n_dim = parameter->n_dim_;
+  const int *input_shape = parameter->input_shape_;
+  int inner_size = 1;
+  int outter_size = 1;
+
+  for (int i = 0; i < axis; i++) {
+    outter_size *= input_shape[i];
+  }
+  for (int i = axis + 1; i < n_dim; i++) {
+    inner_size *= input_shape[i];
+  }
+  for (int i = 0; i < outter_size; i++) {
+    int outter_offset = i * input_shape[axis] * inner_size;
+    int sum_outter_offset = i * inner_size;
+    for (int k = 0; k < inner_size; k++) {
+      int inner_offset = outter_offset + k;
+      float max_data = input_ptr[inner_offset];
+      sum_data[k + sum_outter_offset] = 0;
+      for (int j = 0; j < input_shape[axis]; j++) {
+        int axis_offset = inner_offset + j * inner_size;
+        max_data = max_data > input_ptr[axis_offset] ? max_data : input_ptr[axis_offset];
+      }
+      for (int j = 0; j < input_shape[axis]; j++) {
+        int axis_offset = inner_offset + j * inner_size;
+        output_ptr[axis_offset] = input_ptr[axis_offset] - max_data;
+        sum_data[k + sum_outter_offset] += exp(output_ptr[axis_offset]);
+      }
+    }
+  }
+  for (int i = 0; i < outter_size; i++) {
+    int outter_offset = i * input_shape[axis] * inner_size;
+    int sum_outter_offset = i * inner_size;
+    for (int j = 0; j < input_shape[axis]; j++) {
+      int axis_offset = outter_offset + j * inner_size;
+      for (int k = 0; k < inner_size; k++) {
+        int inner_offset = axis_offset + k;
+        output_ptr[inner_offset] = output_ptr[inner_offset] - log(sum_data[k + sum_outter_offset]);
+      }
+    }
+  }
+}
diff --git a/mindspore/lite/nnacl/fp32/log_softmax_fp32.h b/mindspore/lite/nnacl/fp32/log_softmax_fp32.h
new file mode 100644
index 0000000000..46fa76062c
--- /dev/null
+++ b/mindspore/lite/nnacl/fp32/log_softmax_fp32.h
@@ -0,0 +1,31 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_LITE_NNACL_FP32_LOG_SOFTMAX_H_
+#define MINDSPORE_LITE_NNACL_FP32_LOG_SOFTMAX_H_
+
+#include "nnacl/op_base.h"
+#include "nnacl/softmax_parameter.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+void LogSoftmax(const float *input_ptr, float *output_ptr, float *sum_data, const SoftmaxParameter *parameter);
+void LogSoftmaxLastAxis(const float *src, float *dst, float *exp_data, int batch, int channel);
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // MINDSPORE_LITE_NNACL_FP32_LOG_SOFTMAX_H_
diff --git a/mindspore/lite/nnacl/fp32/softmax_fp32.c b/mindspore/lite/nnacl/fp32/softmax_fp32.c
index 943eaa15e2..5d616a97f3 100644
--- a/mindspore/lite/nnacl/fp32/softmax_fp32.c
+++ b/mindspore/lite/nnacl/fp32/softmax_fp32.c
@@ -121,6 +121,7 @@ void Softmax(const float *input_ptr, float *output_ptr, float *sum_data, const S
     for (int k = 0; k < inner_size; k++) {
       int inner_offset = outter_offset + k;
       float max_data = input_ptr[inner_offset];
+      sum_data[k + sum_outter_offset] = 0;
       for (int j = 0; j < input_shape[axis]; j++) {
         int axis_offset = inner_offset + j * inner_size;
         max_data = max_data > input_ptr[axis_offset] ? max_data : input_ptr[axis_offset];
diff --git a/mindspore/lite/nnacl/fp32/softmax_fp32.h b/mindspore/lite/nnacl/fp32/softmax_fp32.h
index 553b79ba6d..f8ec5ffeb3 100644
--- a/mindspore/lite/nnacl/fp32/softmax_fp32.h
+++ b/mindspore/lite/nnacl/fp32/softmax_fp32.h
@@ -24,6 +24,7 @@ extern "C" {
 #endif
 void Softmax(const float *input_ptr, float *output_ptr, float *sum_data, const SoftmaxParameter *parameter);
 void SoftmaxLastAxis(const float *src, float *dst, int batch, int channel);
+void SoftmaxNorm(const float *src, float *dst, int batch, int channel);
 #ifdef __cplusplus
 }
 #endif
diff --git a/mindspore/lite/nnacl/infer/infer_register.h b/mindspore/lite/nnacl/infer/infer_register.h
index 35f9ba047e..8d66b12b28 100644
--- a/mindspore/lite/nnacl/infer/infer_register.h
+++ b/mindspore/lite/nnacl/infer/infer_register.h
@@ -213,8 +213,9 @@ enum PrimType {
   PrimType_LayerNormGrad = 186,
   PrimType_ResizeGrad = 187,
   PrimType_Splice = 188,
+  PrimType_LogSoftmax = 189,
   PrimType_MIN = PrimType_NONE,
-  PrimType_MAX = PrimType_Splice + 1
+  PrimType_MAX = PrimType_LogSoftmax + 1
 };
 
 void RegInfer(int prim_type, InferShape func);
diff --git a/mindspore/lite/nnacl/infer/log_softmax_infer.c b/mindspore/lite/nnacl/infer/log_softmax_infer.c
new file mode 100644
index 0000000000..a8a16a6f5c
--- /dev/null
+++ b/mindspore/lite/nnacl/infer/log_softmax_infer.c
@@ -0,0 +1,44 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "nnacl/infer/log_softmax_infer.h"
+#include "nnacl/infer/infer_register.h"
+
+int LogSoftmaxInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC **outputs, size_t outputs_size,
+                         OpParameter *parameter) {
+#ifdef Debug
+  int check_ret = CheckAugmentNull(inputs, inputs_size, outputs, outputs_size, parameter);
+  if (check_ret != NNACL_OK) {
+    return check_ret;
+  }
+#endif
+
+  const TensorC *input = inputs[0];
+  TensorC *output = outputs[0];
+
+  output->data_type_ = input->data_type_;
+  output->format_ = input->format_;
+  if (!parameter->infer_flag_) {
+    return NNACL_INFER_INVALID;
+  }
+  if (input->shape_size_ > 5) {
+    return NNACL_ERR;
+  }
+  SetShapeTensor(output, input);
+  return NNACL_OK;
+}
+
+REG_INFER(LogSoftmax, PrimType_LogSoftmax, LogSoftmaxInferShape)
diff --git a/mindspore/lite/nnacl/infer/log_softmax_infer.h b/mindspore/lite/nnacl/infer/log_softmax_infer.h
new file mode 100644
index 0000000000..9f25e256d8
--- /dev/null
+++ b/mindspore/lite/nnacl/infer/log_softmax_infer.h
@@ -0,0 +1,32 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_LITE_NNACL_LOG_SOFTMAX_INFER_H
+#define MINDSPORE_LITE_NNACL_LOG_SOFTMAX_INFER_H
+
+#include "nnacl/infer/common_infer.h"
+#include "nnacl/softmax_parameter.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int LogSoftMaxInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC **outputs, size_t outputs_size,
+                         OpParameter *parameter);
+
+#ifdef __cplusplus
+}
+#endif
+#endif  // MINDSPORE_LITE_NNACL_LOG_SOFTMAX_INFER_H
diff --git a/mindspore/lite/schema/ops.fbs b/mindspore/lite/schema/ops.fbs
index f49b5912c2..2af4e527cd 100644
--- a/mindspore/lite/schema/ops.fbs
+++ b/mindspore/lite/schema/ops.fbs
@@ -206,6 +206,7 @@ union PrimitiveType {
     LayerNormGrad,
     ResizeGrad,
     Splice,
+    LogSoftmax,
 }
 
 table Abs {
@@ -1094,3 +1095,7 @@ table Splice {
     forward_indexes: [long];
     output_dim: long;
 }
+
+table LogSoftmax {
+    axis: long;
+}
diff --git a/mindspore/lite/src/ops/ops_def.cc b/mindspore/lite/src/ops/ops_def.cc
index 679ee21920..e5fd9335d7 100644
--- a/mindspore/lite/src/ops/ops_def.cc
+++ b/mindspore/lite/src/ops/ops_def.cc
@@ -205,6 +205,7 @@ OP_TYPE(SqrtGrad)
 OP_TYPE(LayerNormGrad)
 OP_TYPE(ResizeGrad)
 OP_TYPE(Splice)
+OP_TYPE(LogSoftmax)
 OP_TYPE_DEF_END(PrimitiveType)
 
 OP_SCHEMA_DEF(Abs)
@@ -1093,3 +1094,7 @@ OP_ATTR(context, [long])
 OP_ATTR(forward_indexes, [long])
 OP_ATTR(output_dim, long)
 OP_SCHEMA_DEF_END(Splice)
+
+OP_SCHEMA_DEF(LogSoftmax)
+OP_ATTR(axis, long)
+OP_SCHEMA_DEF_END(LogSoftmax)
diff --git a/mindspore/lite/src/ops/ops_func_declare.h b/mindspore/lite/src/ops/ops_func_declare.h
index fa150d92c3..dba2a7d9b9 100644
--- a/mindspore/lite/src/ops/ops_func_declare.h
+++ b/mindspore/lite/src/ops/ops_func_declare.h
@@ -243,6 +243,7 @@
 #include "ops/uniform_real.h"
 #include "ops/grad/abs_grad.h"
 #include "ops/splice.h"
+#include "ops/log_softmax.h"
 
 #define FUNC_MSOP2SCHEMAOP_DECLARE(OP)                                        \
   namespace mindspore::lite::ops {                                            \
@@ -455,5 +456,6 @@ FUNC_MSOP2SCHEMAOP_DECLARE(SqrtGrad);
 FUNC_MSOP2SCHEMAOP_DECLARE(LayerNormGrad);
 FUNC_MSOP2SCHEMAOP_DECLARE(ResizeGrad);
 FUNC_MSOP2SCHEMAOP_DECLARE(Splice);
+FUNC_MSOP2SCHEMAOP_DECLARE(LogSoftmax);
 #endif
 #endif  // MINDSPORE_LITE_SRC_OPS_OPS_FUNC_DECLARE_H_
diff --git a/mindspore/lite/src/ops/ops_utils.cc b/mindspore/lite/src/ops/ops_utils.cc
index a7a73f5432..fad6c45fe6 100644
--- a/mindspore/lite/src/ops/ops_utils.cc
+++ b/mindspore/lite/src/ops/ops_utils.cc
@@ -750,6 +750,11 @@ schema::PrimitiveT *SplicePrimitiveCreator(const AnfNodePtr &node) {
   return ms_primc != nullptr ? ops::MSOp2SchemaOp(ms_primc.get()) : nullptr;
 }
 
+schema::PrimitiveT *LogSoftmaxPrimitiveCreator(const AnfNodePtr &node) {
+  auto ms_primc = GetValueNode<std::shared_ptr<mindspore::ops::LogSoftmax>>(node);
+  return ms_primc != nullptr ? ops::MSOp2SchemaOp(ms_primc.get()) : nullptr;
+}
+
 RegistryMSOps g_absPrimitiveCreatorRegistry("Abs", AbsPrimitiveCreator);
 RegistryMSOps g_absGradPrimitiveCreatorRegistry("AbsGrad", AbsGradPrimitiveCreator);
 RegistryMSOps g_activationPrimitiveCreatorRegistry("Activation", ActivationPrimitiveCreator);
@@ -960,6 +965,7 @@ RegistryMSOps g_wherePrimitiveCreatorRegistry("Where", WherePrimitiveCreator);
 RegistryMSOps g_zerosLikePrimitiveCreatorRegistry("ZerosLike", ZerosLikePrimitiveCreator);
 RegistryMSOps g_erfPrimitiveCreatorRegistry("Erf", ErfPrimitiveCreator);
 RegistryMSOps g_SplicePrimitiveCreatorRegistry("Splice", SplicePrimitiveCreator);
+RegistryMSOps g_LogSoftmaxPrimitiveCreatorRegistry("LogSoftmax", LogSoftmaxPrimitiveCreator);
 }  // namespace lite
 }  // namespace mindspore
 
diff --git a/mindspore/lite/src/ops/populate/log_softmax_populate.cc b/mindspore/lite/src/ops/populate/log_softmax_populate.cc
new file mode 100644
index 0000000000..9a28d31c03
--- /dev/null
+++ b/mindspore/lite/src/ops/populate/log_softmax_populate.cc
@@ -0,0 +1,40 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "src/ops/populate/populate_register.h"
+#include "nnacl/softmax_parameter.h"
+using mindspore::schema::PrimitiveType_LogSoftmax;
+
+namespace mindspore {
+namespace lite {
+namespace {
+OpParameter *PopulateLogSoftmaxParameter(const void *prim) {
+  SoftmaxParameter *log_softmax_param = reinterpret_cast<SoftmaxParameter *>(malloc(sizeof(SoftmaxParameter)));
+  if (log_softmax_param == nullptr) {
+    MS_LOG(ERROR) << "malloc LogSoftmaxParameter failed.";
+    return nullptr;
+  }
+  memset(log_softmax_param, 0, sizeof(SoftmaxParameter));
+  auto primitive = static_cast<const schema::Primitive *>(prim);
+  log_softmax_param->op_parameter_.type_ = primitive->value_type();
+  auto prim_log_softmax = primitive->value_as_LogSoftmax();
+  log_softmax_param->axis_ = prim_log_softmax->axis();
+  return reinterpret_cast<OpParameter *>(log_softmax_param);
+}
+}  // namespace
+
+REG_POPULATE(PrimitiveType_LogSoftmax, PopulateLogSoftmaxParameter, SCHEMA_CUR);
+}  // namespace lite
+}  // namespace mindspore
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.cc b/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.cc
new file mode 100644
index 0000000000..379f61694f
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.cc
@@ -0,0 +1,119 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <string.h>
+#include <vector>
+#include "src/runtime/kernel/arm/fp16/log_softmax_fp16.h"
+#include "src/runtime/kernel/arm/fp16/common_fp16.h"
+#include "nnacl/fp16/log_softmax_fp16.h"
+#include "nnacl/fp16/cast_fp16.h"
+#include "schema/model_generated.h"
+#include "src/kernel_registry.h"
+#include "include/errorcode.h"
+
+using mindspore::kernel::KERNEL_ARCH::kCPU;
+using mindspore::lite::KernelRegistrar;
+using mindspore::lite::RET_ERROR;
+using mindspore::lite::RET_OK;
+using mindspore::schema::PrimitiveType_LogSoftmax;
+
+namespace mindspore::kernel {
+int LogSoftmaxFp16CPUKernel::Init() {
+  auto ret = SoftmaxBaseCPUKernel::Init();
+  if (ret != RET_OK) {
+    return ret;
+  }
+
+  if (!InferShapeDone()) {
+    return RET_OK;
+  }
+  return ReSize();
+}
+
+int LogSoftmaxFp16CPUKernel::ReSize() {
+  auto ret = SoftmaxBaseCPUKernel::ReSize();
+  if (ret != RET_OK) {
+    return ret;
+  }
+  auto n_dim = softmax_param_->n_dim_;
+  auto axis = softmax_param_->axis_;
+  auto in_shape = in_tensors_.front()->shape();
+  out_plane_size_ = 1;
+  for (int i = 0; i < axis; ++i) {
+    out_plane_size_ *= in_shape[i];
+  }
+  in_plane_size_ = 1;
+  for (int i = axis + 1; i < n_dim; i++) {
+    in_plane_size_ *= in_shape[i];
+  }
+  auto tmp_data_size =
+    in_plane_size_ == 1 ? out_plane_size_ * in_plane_size_ * in_shape.at(axis) : out_plane_size_ * in_plane_size_;
+  if (tmp_data_ != nullptr) {
+    free(tmp_data_);
+  }
+  tmp_data_ = reinterpret_cast<float16_t *>(malloc(tmp_data_size * sizeof(float16_t)));
+  if (tmp_data_ == nullptr) {
+    MS_LOG(ERROR) << "malloc data for softmax fail!";
+    return RET_ERROR;
+  }
+  return RET_OK;
+}
+
+int LogSoftmaxFp16CPUKernel::DoLogSoftmaxLastAxis(int task_id) {
+  int unit = UP_DIV(out_plane_size_, context_->thread_num_);
+  int begin = task_id * unit;
+  int end = MSMIN(begin + unit, out_plane_size_);
+  int channel = softmax_param_->input_shape_[softmax_param_->axis_];
+  int offset = begin * channel;
+  auto input_ptr = reinterpret_cast<float16_t *>(in_tensors_.at(kInputIndex)->MutableData());
+  auto output_ptr = reinterpret_cast<float16_t *>(out_tensors_.at(kOutputIndex)->MutableData());
+  LogSoftmaxLastAxisFp16(input_ptr + offset, output_ptr + offset, tmp_data_ + offset, end - begin, channel);
+  return RET_OK;
+}
+
+int LogSoftmaxLastAxisFp16Run(void *cdata, int task_id) {
+  auto kernel = reinterpret_cast<LogSoftmaxFp16CPUKernel *>(cdata);
+  auto ret = kernel->DoLogSoftmaxLastAxis(task_id);
+  if (ret != RET_OK) {
+    MS_LOG(ERROR) << "DoLogSoftmaxLastAxisFp16 error task_id: " << task_id << ", ret: " << ret;
+  }
+  return ret;
+}
+
+int LogSoftmaxFp16CPUKernel::Run() {
+  if (in_plane_size_ == 1) {
+    auto ret = ParallelLaunch(this->context_->thread_pool_, LogSoftmaxLastAxisFp16Run, this, context_->thread_num_);
+    if (ret != RET_OK) {
+      MS_LOG(ERROR) << "LogSoftmaxFp16CPUKernel ParallelLaunch failed, ret: " << ret;
+    }
+    return ret;
+  } else {
+    auto input_tensor = in_tensors_.at(0);
+    MS_ASSERT(input_tensor);
+    auto output_tensor = out_tensors_.at(0);
+    MS_ASSERT(output_tensor);
+    input_fp16_ = reinterpret_cast<float16_t *>(input_tensor->data_c());
+    MS_ASSERT(input_fp16_);
+    output_fp16_ = reinterpret_cast<float16_t *>(output_tensor->data_c());
+    MS_ASSERT(output_fp16_);
+    MS_ASSERT(tmp_data_);
+    LogSoftmaxFp16(input_fp16_, output_fp16_, tmp_data_, softmax_param_);
+  }
+  return RET_OK;
+}
+
+REG_KERNEL(kCPU, kNumberTypeFloat16, PrimitiveType_LogSoftmax, LiteKernelCreator<LogSoftmaxFp16CPUKernel>)
+}  // namespace mindspore::kernel
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.h b/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.h
new file mode 100644
index 0000000000..59afaa35a9
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/fp16/log_softmax_fp16.h
@@ -0,0 +1,53 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP16_LOG_SOFTMAX_FP16_H_
+#define MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP16_LOG_SOFTMAX_FP16_H_
+
+#include <arm_neon.h>
+#include <vector>
+#include "src/lite_kernel.h"
+#include "src/runtime/kernel/arm/base/softmax_base.h"
+
+namespace mindspore::kernel {
+class LogSoftmaxFp16CPUKernel : public SoftmaxBaseCPUKernel {
+ public:
+  LogSoftmaxFp16CPUKernel(OpParameter *parameter, const std::vector<lite::Tensor *> &inputs,
+                          const std::vector<lite::Tensor *> &outputs, const lite::InnerContext *ctx)
+      : SoftmaxBaseCPUKernel(parameter, inputs, outputs, ctx), tmp_data_(nullptr) {}
+  ~LogSoftmaxFp16CPUKernel() override {
+    if (tmp_data_ != nullptr) {
+      free(tmp_data_);
+    }
+  }
+
+  int Init() override;
+  int ReSize() override;
+  int Run() override;
+  int MallocTmpBuffer();
+  void FreeTmpBuffer();
+  int DoLogSoftmaxLastAxis(int task_id);
+
+ private:
+  float16_t *tmp_data_ = nullptr;
+  float16_t *input_fp16_ = nullptr;
+  float16_t *output_fp16_ = nullptr;
+  int in_plane_size_ = 0;
+  int out_plane_size_ = 0;
+};
+}  // namespace mindspore::kernel
+
+#endif  // MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP16_LOG_SOFTMAX_FP16_H_
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp16/softmax_fp16.cc b/mindspore/lite/src/runtime/kernel/arm/fp16/softmax_fp16.cc
index 3a3cce72e6..275861deaa 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp16/softmax_fp16.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/fp16/softmax_fp16.cc
@@ -59,13 +59,15 @@ int SoftmaxFp16CPUKernel::ReSize() {
   for (int i = axis + 1; i < n_dim; i++) {
     in_plane_size_ *= in_shape[i];
   }
-  if (sum_data_ != nullptr) {
-    free(sum_data_);
-  }
-  sum_data_ = reinterpret_cast<float16_t *>(malloc(out_plane_size_ * in_plane_size_ * sizeof(float16_t)));
-  if (sum_data_ == nullptr) {
-    MS_LOG(ERROR) << "malloc data for softmax fail!";
-    return RET_ERROR;
+  if (in_plane_size_ > 1) {
+    if (sum_data_ != nullptr) {
+      free(sum_data_);
+    }
+    sum_data_ = reinterpret_cast<float16_t *>(malloc(out_plane_size_ * in_plane_size_ * sizeof(float16_t)));
+    if (sum_data_ == nullptr) {
+      MS_LOG(ERROR) << "malloc data for softmax fail!";
+      return RET_ERROR;
+    }
   }
   return RET_OK;
 }
@@ -92,14 +94,6 @@ int SoftmaxLastAxisFp16Run(void *cdata, int task_id) {
 }
 
 int SoftmaxFp16CPUKernel::Run() {
-  auto input_tensor = in_tensors_.at(0);
-  MS_ASSERT(input_tensor);
-  auto output_tensor = out_tensors_.at(0);
-  MS_ASSERT(output_tensor);
-  input_fp16_ = reinterpret_cast<float16_t *>(input_tensor->data_c());
-  MS_ASSERT(input_fp16_);
-  output_fp16_ = reinterpret_cast<float16_t *>(output_tensor->data_c());
-  MS_ASSERT(output_fp16_);
   if (in_plane_size_ == 1) {
     auto ret = ParallelLaunch(this->context_->thread_pool_, SoftmaxLastAxisFp16Run, this, context_->thread_num_);
     if (ret != RET_OK) {
@@ -107,8 +101,15 @@ int SoftmaxFp16CPUKernel::Run() {
     }
     return ret;
   } else {
+    auto input_tensor = in_tensors_.at(0);
+    MS_ASSERT(input_tensor);
+    auto output_tensor = out_tensors_.at(0);
+    MS_ASSERT(output_tensor);
+    input_fp16_ = reinterpret_cast<float16_t *>(input_tensor->data_c());
+    MS_ASSERT(input_fp16_);
+    output_fp16_ = reinterpret_cast<float16_t *>(output_tensor->data_c());
+    MS_ASSERT(output_fp16_);
     MS_ASSERT(sum_data_);
-    memset(sum_data_, 0, out_plane_size_ * in_plane_size_ * sizeof(float16_t));
     SoftmaxFp16(input_fp16_, output_fp16_, sum_data_, softmax_param_);
   }
   return RET_OK;
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.cc b/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.cc
new file mode 100644
index 0000000000..e9f5eac957
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.cc
@@ -0,0 +1,116 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "src/runtime/kernel/arm/fp32/log_softmax_fp32.h"
+#include <string.h>
+#include <vector>
+#include "nnacl/fp32/log_softmax_fp32.h"
+#include "schema/model_generated.h"
+#include "src/kernel_registry.h"
+#include "include/errorcode.h"
+
+using mindspore::kernel::KERNEL_ARCH::kCPU;
+using mindspore::lite::KernelRegistrar;
+using mindspore::lite::RET_ERROR;
+using mindspore::lite::RET_OK;
+using mindspore::schema::PrimitiveType_LogSoftmax;
+
+namespace mindspore::kernel {
+int LogSoftmaxCPUKernel::Init() {
+  auto ret = SoftmaxBaseCPUKernel::Init();
+  if (ret != RET_OK) {
+    return ret;
+  }
+
+  if (!InferShapeDone()) {
+    return RET_OK;
+  }
+  return ReSize();
+}
+
+int LogSoftmaxCPUKernel::ReSize() {
+  auto ret = SoftmaxBaseCPUKernel::ReSize();
+  if (ret != RET_OK) {
+    return ret;
+  }
+  auto n_dim = softmax_param_->n_dim_;
+  auto axis = softmax_param_->axis_;
+  auto in_shape = in_tensors_.front()->shape();
+  int out_plane_size = 1;
+  for (int i = 0; i < axis; ++i) {
+    out_plane_size *= in_shape.at(i);
+  }
+  int in_plane_size = 1;
+  for (int i = axis + 1; i < n_dim; i++) {
+    in_plane_size *= in_shape.at(i);
+  }
+  in_plane_size_ = in_plane_size;
+  out_plane_size_ = out_plane_size;
+  auto tmp_data_size =
+    in_plane_size == 1 ? out_plane_size * in_plane_size * in_shape.at(axis) : out_plane_size * in_plane_size;
+  if (tmp_data_ != nullptr) {
+    free(tmp_data_);
+  }
+  tmp_data_ = reinterpret_cast<float *>(malloc(tmp_data_size * sizeof(float)));
+  if (tmp_data_ == nullptr) {
+    MS_LOG(ERROR) << "malloc data for log_softmax fail!";
+    return RET_ERROR;
+  }
+  return RET_OK;
+}
+
+int LogSoftmaxCPUKernel::DoLogSoftmaxLastAxis(int task_id) {
+  int unit = UP_DIV(out_plane_size_, context_->thread_num_);
+  int begin = task_id * unit;
+  int end = MSMIN(begin + unit, out_plane_size_);
+  int channel = softmax_param_->input_shape_[softmax_param_->axis_];
+  int offset = begin * channel;
+  auto input_ptr = reinterpret_cast<float *>(in_tensors_.at(kInputIndex)->MutableData());
+  auto output_ptr = reinterpret_cast<float *>(out_tensors_.at(kOutputIndex)->MutableData());
+  LogSoftmaxLastAxis(input_ptr + offset, output_ptr + offset, tmp_data_ + offset, end - begin, channel);
+  return RET_OK;
+}
+
+int LogSoftmaxLastAxisRun(void *cdata, int task_id) {
+  auto kernel = reinterpret_cast<LogSoftmaxCPUKernel *>(cdata);
+  auto ret = kernel->DoLogSoftmaxLastAxis(task_id);
+  if (ret != RET_OK) {
+    MS_LOG(ERROR) << "DoLogSoftmaxLastAxis error task_id: " << task_id << ", ret: " << ret;
+  }
+  return ret;
+}
+
+int LogSoftmaxCPUKernel::Run() {
+  int ret = RET_OK;
+  if (in_plane_size_ == 1) {
+    ret = ParallelLaunch(this->context_->thread_pool_, LogSoftmaxLastAxisRun, this, context_->thread_num_);
+    if (ret != RET_OK) {
+      MS_LOG(ERROR) << "LogSoftmaxCPUKernel ParallelLaunch failed, ret: " << ret;
+    }
+  } else {
+    auto input_ptr = reinterpret_cast<float *>(in_tensors_.at(kInputIndex)->data_c());
+    MS_ASSERT(input_ptr);
+    auto output_ptr = reinterpret_cast<float *>(out_tensors_.at(kOutputIndex)->data_c());
+    MS_ASSERT(output_ptr);
+    MS_ASSERT(tmp_data_);
+    MS_ASSERT(softmax_param_);
+    LogSoftmax(input_ptr, output_ptr, tmp_data_, softmax_param_);
+  }
+  return ret;
+}
+
+REG_KERNEL(kCPU, kNumberTypeFloat32, PrimitiveType_LogSoftmax, LiteKernelCreator<LogSoftmaxCPUKernel>)
+}  // namespace mindspore::kernel
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.h b/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.h
new file mode 100644
index 0000000000..00689c866c
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/log_softmax_fp32.h
@@ -0,0 +1,48 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP32_LOG_SOFTMAX_H_
+#define MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP32_LOG_SOFTMAX_H_
+
+#include <vector>
+#include "src/lite_kernel.h"
+#include "src/runtime/kernel/arm/base/softmax_base.h"
+
+namespace mindspore::kernel {
+class LogSoftmaxCPUKernel : public SoftmaxBaseCPUKernel {
+ public:
+  LogSoftmaxCPUKernel(OpParameter *parameter, const std::vector<lite::Tensor *> &inputs,
+                      const std::vector<lite::Tensor *> &outputs, const lite::InnerContext *ctx)
+      : SoftmaxBaseCPUKernel(parameter, inputs, outputs, ctx), tmp_data_(nullptr) {}
+  ~LogSoftmaxCPUKernel() override {
+    if (tmp_data_ != nullptr) {
+      free(tmp_data_);
+    }
+  };
+
+  int Init() override;
+  int ReSize() override;
+  int Run() override;
+  int DoLogSoftmaxLastAxis(int task_id);
+
+ private:
+  float *tmp_data_ = nullptr;
+  int in_plane_size_ = 0;
+  int out_plane_size_ = 0;
+};
+}  // namespace mindspore::kernel
+
+#endif  // MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_FP32_LOG_SOFTMAX_H_
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/softmax_fp32.cc b/mindspore/lite/src/runtime/kernel/arm/fp32/softmax_fp32.cc
index adedc54d90..619d5ceae4 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/softmax_fp32.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/softmax_fp32.cc
@@ -59,13 +59,15 @@ int SoftmaxCPUKernel::ReSize() {
   }
   in_plane_size_ = in_plane_size;
   out_plane_size_ = out_plane_size;
-  if (sum_data_ != nullptr) {
-    free(sum_data_);
-  }
-  sum_data_ = reinterpret_cast<float *>(malloc(out_plane_size * in_plane_size * sizeof(float)));
-  if (sum_data_ == nullptr) {
-    MS_LOG(ERROR) << "malloc data for softmax fail!";
-    return RET_ERROR;
+  if (in_plane_size_ > 1) {
+    if (sum_data_ != nullptr) {
+      free(sum_data_);
+    }
+    sum_data_ = reinterpret_cast<float *>(malloc(out_plane_size * in_plane_size * sizeof(float)));
+    if (sum_data_ == nullptr) {
+      MS_LOG(ERROR) << "malloc data for softmax fail!";
+      return RET_ERROR;
+    }
   }
   return RET_OK;
 }
@@ -92,10 +94,6 @@ int SoftmaxLastAxisRun(void *cdata, int task_id) {
 }
 
 int SoftmaxCPUKernel::Run() {
-  auto input_ptr = reinterpret_cast<float *>(in_tensors_.at(kInputIndex)->MutableData());
-  MS_ASSERT(input_ptr);
-  auto output_ptr = reinterpret_cast<float *>(out_tensors_.at(kOutputIndex)->MutableData());
-  MS_ASSERT(output_ptr);
   int ret = RET_OK;
   if (in_plane_size_ == 1) {
     ret = ParallelLaunch(this->context_->thread_pool_, SoftmaxLastAxisRun, this, context_->thread_num_);
@@ -104,8 +102,11 @@ int SoftmaxCPUKernel::Run() {
     }
   } else {
     MS_ASSERT(sum_data_);
-    memset(sum_data_, 0, in_plane_size_ * out_plane_size_ * sizeof(float));
     MS_ASSERT(softmax_param_);
+    auto input_ptr = reinterpret_cast<float *>(in_tensors_.at(kInputIndex)->data_c());
+    MS_ASSERT(input_ptr);
+    auto output_ptr = reinterpret_cast<float *>(out_tensors_.at(kOutputIndex)->data_c());
+    MS_ASSERT(output_ptr);
     Softmax(input_ptr, output_ptr, sum_data_, softmax_param_);
   }
   return ret;
diff --git a/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.cc b/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.cc
new file mode 100644
index 0000000000..da4d8ce519
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.cc
@@ -0,0 +1,45 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "tools/converter/parser/onnx/onnx_log_softmax_parser.h"
+#include <memory>
+#include "ops/log_softmax.h"
+
+namespace mindspore {
+namespace lite {
+ops::PrimitiveC *OnnxLogSoftmaxParser::Parse(const onnx::GraphProto &onnx_graph, const onnx::NodeProto &onnx_node) {
+  auto prim = std::make_unique<ops::LogSoftmax>();
+
+  int64_t axis;
+  bool axis_is_def = true;
+  for (const auto &onnx_node_attr : onnx_node.attribute()) {
+    const auto &attribute_name = onnx_node_attr.name();
+    if (attribute_name == "axis") {
+      axis = onnx_node_attr.i();
+      axis_is_def = false;
+    }
+  }
+  if (axis_is_def) {
+    axis = OnnxNodeParser::opset_version() >= 13 ? -1 : 1;
+  }
+  prim->set_axis({axis});
+
+  return prim.release();
+}
+
+OnnxNodeRegistrar g_onnxLogSoftmaxParser("LogSoftmax", new OnnxLogSoftmaxParser());
+}  // namespace lite
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.h b/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.h
new file mode 100644
index 0000000000..18569cb00b
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/onnx/onnx_log_softmax_parser.h
@@ -0,0 +1,34 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_ONNX_LOG_SOFTMAX_PARSER_H
+#define MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_ONNX_LOG_SOFTMAX_PARSER_H
+
+#include "tools/converter/parser/onnx/onnx_node_parser.h"
+#include "tools/converter/parser/onnx/onnx_node_parser_registry.h"
+
+namespace mindspore {
+namespace lite {
+class OnnxLogSoftmaxParser : public OnnxNodeParser {
+ public:
+  OnnxLogSoftmaxParser() : OnnxNodeParser("LogSoftmax") {}
+  ~OnnxLogSoftmaxParser() override = default;
+
+  ops::PrimitiveC *Parse(const onnx::GraphProto &onnx_graph, const onnx::NodeProto &onnx_node) override;
+};
+}  // namespace lite
+}  // namespace mindspore
+#endif  // MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_ONNX_LOG_SOFTMAX_PARSER_H