diff --git a/mindspore/lite/micro/cmake/file_list.cmake b/mindspore/lite/micro/cmake/file_list.cmake
index 7af24be4e3..180f782326 100644
--- a/mindspore/lite/micro/cmake/file_list.cmake
+++ b/mindspore/lite/micro/cmake/file_list.cmake
@@ -84,6 +84,7 @@ set(CODER_OPCODERS_SRC
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/convolution_depthwise_fp32_coder.cc
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/full_connection_fp32_coder.cc
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/gather_fp32_coder.cc
+        ${MICRO_DIR}/coder/opcoders/nnacl/fp32/lstm_fp32_coder.cc
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/matmul_fp32_base_coder.cc
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/matmul_fp32_coder.cc
         ${MICRO_DIR}/coder/opcoders/nnacl/fp32/pad_fp32_coder.cc
diff --git a/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.cc b/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.cc
new file mode 100644
index 0000000000..c0480f4908
--- /dev/null
+++ b/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.cc
@@ -0,0 +1,194 @@
+/**
+ * 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 "coder/opcoders/nnacl/fp32/lstm_fp32_coder.h"
+#include <float.h>
+#include <string>
+#include "coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.h"
+#include "coder/log.h"
+#include "coder/opcoders/file_collector.h"
+
+using mindspore::schema::PrimitiveType_LSTM;
+
+namespace mindspore::lite::micro::nnacl {
+constexpr int kFifthIndex = 5;
+constexpr int kSixthIndex = 6;
+
+int LstmFP32Coder::InitInputWeightBias(CoderContext *const context) {
+  NNaclFp32Serializer init_code;
+  Tensor *weight_i = input_tensors_.at(kWeightIndex);
+  MS_CHECK_PTR(weight_i);
+  size_t weight_i_size = weight_batch_ * lstm_param_->input_col_align_ * lstm_param_->input_size_ * sizeof(float);
+  weight_i_ptr_ = reinterpret_cast<float *>(allocator_->Malloc(kNumberTypeFloat32, kOnlineSize, kOnlinePackWeight));
+  MS_CHECK_PTR(weight_h_ptr_);
+
+  init_code.CodeMallocExpression(weight_i_ptr_, weight_i_size);
+  init_code.CodeFunction("memset", weight_i_ptr_, 0, weight_i_size);
+  init_code.CodeFunction("PackLstmWeight", weight_i_ptr_, weight_i, weight_batch_, lstm_param_->input_size_,
+                         lstm_param_->hidden_size_, lstm_param_->input_col_align_);
+
+  Tensor *bias_i = input_tensors_.at(kInputSize2);
+  MS_CHECK_PTR(bias_i);
+  input_bias_ = reinterpret_cast<float *>(allocator_->Malloc(kNumberTypeFloat32, kOnlineSize, kOnlinePackWeight));
+  size_t bias_i_size = weight_batch_ * lstm_param_->input_col_align_ * sizeof(float);
+  init_code.CodeMallocExpression(input_bias_, bias_i_size);
+  init_code.CodeFunction("memset", input_bias_, 0, bias_i_size);
+  init_code.CodeFunction("PackLstmBias", input_bias_, bias_i, weight_batch_, lstm_param_->hidden_size_,
+                         lstm_param_->input_col_align_, lstm_param_->bidirectional_);
+  context->AppendInitCode(init_code.str());
+  return RET_OK;
+}
+
+int LstmFP32Coder::InitStateWeightBias(CoderContext *const context) {
+  NNaclFp32Serializer init_code;
+  Tensor *weight_h = input_tensors().at(kInputSize1);
+  MS_CHECK_PTR(weight_h);
+  if (!is_vec_) {
+    size_t weight_h_size = weight_batch_ * lstm_param_->state_col_align_ * lstm_param_->hidden_size_ * sizeof(float);
+    weight_h_ptr_ = reinterpret_cast<float *>(allocator_->Malloc(kNumberTypeFloat32, kOnlineSize, kOnlinePackWeight));
+    MS_CHECK_PTR(weight_h_ptr_);
+    init_code.CodeMallocExpression(weight_i_ptr_, weight_h_size);
+    init_code.CodeFunction("memset", weight_i_ptr_, 0, weight_h_size);
+    init_code.CodeFunction("PackLstmWeight", weight_h_ptr_, weight_h, weight_batch_, lstm_param_->hidden_size_,
+                           lstm_param_->hidden_size_, lstm_param_->state_col_align_);
+  } else {
+    size_t weight_h_size = weight_h->Size();
+    weight_h_ptr_ =
+      reinterpret_cast<float *>(allocator_->Malloc(kNumberTypeFloat32, weight_h->Size(), kOfflinePackWeight));
+    MS_CHECK_PTR(weight_h_ptr_);
+    MS_CHECK_RET_CODE(memcpy_s(weight_h_ptr_, weight_h_size, weight_h->data_c(), weight_h_size),
+                      "copy weight h data failed");
+  }
+
+  state_bias_ = reinterpret_cast<float *>(allocator_->Malloc(kNumberTypeFloat32, kOnlineSize, kOnlinePackWeight));
+  size_t state_bias_size = weight_batch_ * lstm_param_->state_col_align_ * sizeof(float);
+  init_code.CodeMallocExpression(state_bias_, state_bias_size);
+  init_code.CodeFunction("memset", state_bias_, 0, state_bias_size);
+
+  Tensor *bias_i = input_tensors_.at(kInputSize2);
+  MS_CHECK_PTR(bias_i);
+  std::string state_bias_addr =
+    allocator_->GetRuntimeAddr(bias_i) + "+" + std::to_string(4 * lstm_param_->hidden_size_);
+  init_code.CodeFunction("PackLstmBias", state_bias_, state_bias_addr, weight_batch_, lstm_param_->hidden_size_,
+                         lstm_param_->state_col_align_, lstm_param_->bidirectional_);
+  context->AppendInitCode(init_code.str());
+  return RET_OK;
+}
+
+int LstmFP32Coder::InitParam() {
+  std::vector<int> in_shape = input_tensor_->shape();
+  lstm_param_->seq_len_ = in_shape.at(0);
+  lstm_param_->batch_ = in_shape.at(1);
+  lstm_param_->input_size_ = in_shape.at(2);
+
+  auto weight_i = input_tensors_.at(1);
+  MS_ASSERT(weight_i != nullptr);
+  std::vector<int> w_shape = weight_i->shape();
+  lstm_param_->hidden_size_ = w_shape.at(1) / 4;
+  lstm_param_->output_step_ = lstm_param_->bidirectional_ ? 2 * lstm_param_->batch_ * lstm_param_->hidden_size_
+                                                          : lstm_param_->batch_ * lstm_param_->hidden_size_;
+  weight_batch_ = lstm_param_->bidirectional_ ? 8 : 4;
+
+  if (target_ == kARM32A || target_ == kARM32M) {
+    row_tile_ = C12NUM;
+    col_tile_ = C4NUM;
+  } else {
+    row_tile_ = C12NUM;
+    col_tile_ = C8NUM;
+  }
+  lstm_param_->input_row_align_ = UP_ROUND(lstm_param_->seq_len_ * lstm_param_->batch_, row_tile_);
+  lstm_param_->input_col_align_ = UP_ROUND(lstm_param_->hidden_size_, col_tile_);
+
+  is_vec_ = lstm_param_->batch_ == 1;
+  lstm_param_->state_row_align_ = is_vec_ ? 1 : UP_ROUND(lstm_param_->batch_, row_tile_);
+  lstm_param_->state_col_align_ = is_vec_ ? lstm_param_->hidden_size_ : UP_ROUND(lstm_param_->hidden_size_, col_tile_);
+  return RET_OK;
+}
+
+int LstmFP32Coder::MallocRunBuffer(CoderContext *const context) {
+  buffer_[0] = reinterpret_cast<float *>(allocator_->Malloc(
+    kNumberTypeFloat32, lstm_param_->input_row_align_ * lstm_param_->input_size_ * sizeof(float), kWorkspace));
+  MS_CHECK_PTR(buffer_[0]);
+  buffer_[1] = reinterpret_cast<float *>(allocator_->Malloc(
+    kNumberTypeFloat32, 4 * lstm_param_->seq_len_ * lstm_param_->batch_ * lstm_param_->hidden_size_ * sizeof(float),
+    kWorkspace));
+  MS_CHECK_PTR(buffer_[1]);
+  if (!is_vec_) {
+    buffer_[2] = reinterpret_cast<float *>(allocator_->Malloc(
+      kNumberTypeFloat32, lstm_param_->state_row_align_ * lstm_param_->hidden_size_ * sizeof(float), kWorkspace));
+    MS_CHECK_PTR(buffer_[2]);
+  }
+  buffer_[3] = reinterpret_cast<float *>(allocator_->Malloc(
+    kNumberTypeFloat32, 4 * lstm_param_->batch_ * lstm_param_->hidden_size_ * sizeof(float), kWorkspace));
+  MS_CHECK_PTR(buffer_[3]);
+  if (!(lstm_param_->zoneout_cell_ >= -FLT_EPSILON && lstm_param_->zoneout_cell_ <= FLT_EPSILON)) {
+    buffer_[4] = reinterpret_cast<float *>(allocator_->Malloc(
+      kNumberTypeFloat32, lstm_param_->batch_ * lstm_param_->hidden_size_ * sizeof(float), kWorkspace));
+    MS_CHECK_PTR(buffer_[4]);
+  }
+  if (!(lstm_param_->zoneout_hidden_ >= -FLT_EPSILON && lstm_param_->zoneout_hidden_ <= FLT_EPSILON)) {
+    buffer_[5] = reinterpret_cast<float *>(allocator_->Malloc(
+      kNumberTypeFloat32, lstm_param_->batch_ * lstm_param_->hidden_size_ * sizeof(float), kWorkspace));
+    MS_CHECK_PTR(buffer_[5]);
+  }
+  return RET_OK;
+}
+
+int LstmFP32Coder::ReSize(CoderContext *const context) {
+  MS_CHECK_RET_CODE(InitParam(), "init params of lstm coder failed");
+  MS_CHECK_RET_CODE(InitInputWeightBias(context), "init input weight and bias failed");
+  MS_CHECK_RET_CODE(InitStateWeightBias(context), "init state weight and bias failed");
+  MS_CHECK_RET_CODE(MallocRunBuffer(context), "malloc run buffer failed");
+  return RET_OK;
+}
+
+int LstmFP32Coder::Prepare(CoderContext *const context) {
+  lstm_param_ = reinterpret_cast<LstmParameter *>(parameter_);
+  return ReSize(context);
+}
+
+int LstmFP32Coder::DoCode(CoderContext *context) {
+  Collect(context,
+          {
+            "nnacl/lstm_parameter.h",
+            "nnacl/fp32/lstm_fp32.h",
+          },
+          {
+            "lstm_fp32.c",
+          });
+
+  Tensor *hidden_state = input_tensors_.at(kFifthIndex);
+  MS_CHECK_PTR(hidden_state);
+  Tensor *cell_state = input_tensors_.at(kSixthIndex);
+  MS_CHECK_PTR(cell_state);
+  Tensor *output_hidden_state = output_tensors_[1];
+  MS_CHECK_PTR(output_hidden_state);
+  Tensor *output_cell_state = output_tensors_[2];
+  MS_CHECK_PTR(output_hidden_state);
+
+  NNaclFp32Serializer code;
+  code.CodeStruct("lstm_param", *lstm_param_);
+  code.CodeFunction("memcpy", output_hidden_state, hidden_state, hidden_state->Size());
+  code.CodeFunction("memcpy", output_cell_state, cell_state, cell_state->Size());
+  code.CodeFunction("Lstm", output_tensor_, input_tensor_, weight_i_ptr_, weight_h_ptr_, input_bias_, state_bias_,
+                    output_hidden_state, output_cell_state, buffer_, lstm_param_);
+  context->AppendCode(code.str());
+  return RET_OK;
+}
+
+REG_OPERATOR_CODER(kAllTargets, kNumberTypeFloat32, PrimitiveType_LSTM, CPUOpCoderCreator<LstmFP32Coder>)
+
+}  // namespace mindspore::lite::micro::nnacl
diff --git a/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.h b/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.h
new file mode 100644
index 0000000000..908cf87fb3
--- /dev/null
+++ b/mindspore/lite/micro/coder/opcoders/nnacl/fp32/lstm_fp32_coder.h
@@ -0,0 +1,55 @@
+/**
+ * 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_MICRO_CODER_OPCODERS_NNACL_LSTM_FP32_CODER_H_
+#define MINDSPORE_LITE_MICRO_CODER_OPCODERS_NNACL_LSTM_FP32_CODER_H_
+
+#include <vector>
+#include "coder/opcoders/op_coder.h"
+#include "nnacl/lstm_parameter.h"
+
+namespace mindspore::lite::micro::nnacl {
+class LstmFP32Coder final : public OperatorCoder {
+ public:
+  LstmFP32Coder(const std::vector<Tensor *> &in_tensors, const std::vector<Tensor *> &out_tensors,
+                const Model::Node *node, size_t node_index, Target target)
+      : OperatorCoder(in_tensors, out_tensors, node, node_index, target) {}
+
+  ~LstmFP32Coder() override = default;
+
+  int Prepare(CoderContext *const context) override;
+  int DoCode(CoderContext *const context) override;
+
+ private:
+  int InitParam();
+  int ReSize(CoderContext *const context);
+  int MallocRunBuffer(CoderContext *const context);
+  int InitInputWeightBias(CoderContext *const context);
+  int InitStateWeightBias(CoderContext *const context);
+
+  float *weight_i_ptr_{nullptr};
+  float *weight_h_ptr_{nullptr};
+  float *input_bias_{nullptr};
+  float *state_bias_{nullptr};
+  float *buffer_[6];
+  int row_tile_{0};
+  int col_tile_{0};
+  int weight_batch_{0};
+  bool is_vec_{false};
+  LstmParameter *lstm_param_{nullptr};
+};
+}  // namespace mindspore::lite::micro::nnacl
+#endif  // MINDSPORE_LITE_MICRO_CODER_OPCODERS_NNACL_LSTM_FP32_CODER_H_
diff --git a/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.cc b/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.cc
index 805e8f09d9..04174a13d4 100644
--- a/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.cc
+++ b/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.cc
@@ -108,6 +108,14 @@ void NNaclFp32Serializer::CodeStruct(const std::string &name, const TransposePar
                  transpose_parameter.data_size_);
 }
 
+void NNaclFp32Serializer::CodeStruct(const std::string &name, const LstmParameter &lstm_parameter) {
+  CodeBaseStruct("LstmParameter", name, lstm_parameter.op_parameter_, lstm_parameter.input_size_,
+                 lstm_parameter.hidden_size_, lstm_parameter.seq_len_, lstm_parameter.batch_,
+                 lstm_parameter.output_step_, lstm_parameter.bidirectional_, lstm_parameter.zoneout_cell_,
+                 lstm_parameter.zoneout_hidden_, lstm_parameter.input_row_align_, lstm_parameter.input_col_align_,
+                 lstm_parameter.state_row_align_, lstm_parameter.state_col_align_);
+}
+
 void NNaclFp32Serializer::CodeStruct(const std::string &name, const DeQuantArg &de_quant_arg) {
   // this clusters is meaningless which will be supported in future
   CodeBaseStruct("DeQuantArg", name, de_quant_arg.scale, de_quant_arg.zeroPoint, de_quant_arg.var_corr,
diff --git a/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.h b/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.h
index edc6f28ff2..737c489fc6 100644
--- a/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.h
+++ b/mindspore/lite/micro/coder/opcoders/serializers/nnacl_serializer/nnacl_fp32_serializer.h
@@ -30,6 +30,7 @@
 #include "nnacl/pooling_parameter.h"
 #include "nnacl/softmax_parameter.h"
 #include "nnacl/splice_parameter.h"
+#include "nnacl/lstm_parameter.h"
 #include "wrapper/fp32/dequant_int8_to_fp32_wrapper.h"
 namespace mindspore::lite::micro::nnacl {
 
@@ -43,6 +44,7 @@ class NNaclFp32Serializer : public Serializer {
   void CodeStruct(const std::string &name, const ArithmeticParameter &arithmetic_parameter);
   void CodeStruct(const std::string &name, const ConvParameter &conv_parameter);
   void CodeStruct(const std::string &name, const MatMulParameter &mat_mul_parameter);
+  void CodeStruct(const std::string &name, const LstmParameter &lstm_parameter);
   void CodeStruct(const std::string &name, const ScaleParameter &scale_parameter);
   void CodeStruct(const std::string &name, const SliceParameter &slice_parameter);
   void CodeStruct(const std::string &name, const TileParameter &tile_parameter);