diff --git a/mindspore/lite/include/errorcode.h b/mindspore/lite/include/errorcode.h
index 65519b6f73..edd1d7da52 100644
--- a/mindspore/lite/include/errorcode.h
+++ b/mindspore/lite/include/errorcode.h
@@ -32,6 +32,7 @@ constexpr int RET_PARAM_INVALID = -3; /**< Invalid parameter.*/
 constexpr int RET_NO_CHANGE = -4;     /**< No change. */
 constexpr int RET_SUCCESS_EXIT = -5;  /**< No error but exit. */
 constexpr int RET_MEMORY_FAILED = -6; /**< Fail to create memory. */
+constexpr int RET_NOT_SUPPORT = -7;   /**< Fail to support. */
 
 /* Executor error code, range: [-101,-200] */
 constexpr int RET_OUT_OF_TENSOR_RANGE = -101; /**< Failed to check range. */
@@ -53,6 +54,10 @@ constexpr int RET_FORMAT_ERR = -401; /**< Failed to checking tensor format. */
 /* InferShape error code, range: [-501,-600] */
 constexpr int RET_INFER_ERR = -501;     /**< Failed to infer shape. */
 constexpr int RET_INFER_INVALID = -502; /**< Invalid infer shape before runtime. */
+
+/* User input param error code, range: [-601, 700]*/
+constexpr int RET_INPUT_PARAM_INVALID = -601;     /**< Invalid input param by user. */
+constexpr int RET_INPUT_PARAM_LACK = -602;     /**< LACK input param by user. */
 }  // namespace lite
 }  // namespace mindspore
 
diff --git a/mindspore/lite/schema/model.fbs b/mindspore/lite/schema/model.fbs
index 52a6b77962..fa885526e7 100644
--- a/mindspore/lite/schema/model.fbs
+++ b/mindspore/lite/schema/model.fbs
@@ -203,6 +203,8 @@ union PrimitiveType {
     LogGrad,
     BatchToSpaceND,
     LshProjection,
+    HashtableLookup,
+    SkipGram,
 }
 
 enum QuantType: int {
diff --git a/mindspore/lite/schema/ops.fbs b/mindspore/lite/schema/ops.fbs
index b32aebb856..c728751791 100644
--- a/mindspore/lite/schema/ops.fbs
+++ b/mindspore/lite/schema/ops.fbs
@@ -948,3 +948,12 @@ table BlackBox {
 table LshProjection {
     type : LshProjectionType;
 }
+
+table HashtableLookup {
+}
+
+table SkipGram {
+    includeAllGrams : bool;
+    maxSkipSize : int;
+    ngramSize : int;
+}
diff --git a/mindspore/lite/tools/converter/converter.cc b/mindspore/lite/tools/converter/converter.cc
index 1940bc3e28..039f78ed0f 100644
--- a/mindspore/lite/tools/converter/converter.cc
+++ b/mindspore/lite/tools/converter/converter.cc
@@ -109,15 +109,15 @@ int RunConverter(int argc, const char **argv) {
   std::unique_ptr<converter::Flags> flags(new (std::nothrow) converter::Flags);
   if (flags == nullptr) {
     MS_LOG(ERROR) << "new flags error ";
+    std::cout << "NEW FLAGS ERROR:" << RET_MEMORY_FAILED << std::endl;
     return RET_MEMORY_FAILED;
   }
   auto status = flags->Init(argc, argv);
-  if (status == RET_SUCCESS_EXIT) {
-    return status;
-  }
-  if (status != 0) {
-    MS_LOG(ERROR) << "converter::Flags Init failed: " << status;
-    std::cout << "CONVERTER::FLAGS INIT FAILED" << std::endl;
+  if (status != RET_OK) {
+    if (status != RET_SUCCESS_EXIT) {
+      MS_LOG(ERROR) << "converter::Flags Init failed: " << status;
+      std::cout << "CONVERTER::FLAGS INIT FAILED:" << status << std::endl;
+    }
     return status;
   }
   // Load graph
@@ -148,13 +148,14 @@ int RunConverter(int argc, const char **argv) {
     } break;
     default: {
       MS_LOG(ERROR) << "Unsupported fmkType: " << flags->fmk;
-      return 1;
+      std::cout << "UNSUPPORTED FMKTYPE " << flags->fmk << ":" << RET_INPUT_PARAM_INVALID << std::endl;
+      return RET_INPUT_PARAM_INVALID;
     }
   }
   status = ReturnCode::GetSingleReturnCode()->GetReturnCode();
   if (fb_graph == nullptr) {
     MS_LOG(ERROR) << "Convert model return nullptr";
-    std::cout << "CONVERT RESULT: FAILED!" << std::endl;
+    std::cout << "CONVERT RESULT FAILED:" << status << std::endl;
     return status;
   }
 
@@ -164,14 +165,14 @@ int RunConverter(int argc, const char **argv) {
   status = storage.Save(*fb_graph, flags->outputFile);
   if (status != 0) {
     MS_LOG(ERROR) << "Save graph failed";
-    std::cout << "SAVE GRAPH FAILED!" << std::endl;
-    return RET_ERROR;
+    std::cout << "SAVE GRAPH FAILED:" << status << std::endl;
+    return status;
   }
 
   delete fb_graph;
   MS_LOG(INFO) << "CONVERT RESULT: SUCCESS!";
-  std::cout << "CONVERT RESULT: SUCCESS!" << std::endl;
-  return RET_OK;
+  std::cout << "CONVERT RESULT SUCCESS:" << status << std::endl;
+  return status;
 }
 }  // namespace lite
 }  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/converter_flags.cc b/mindspore/lite/tools/converter/converter_flags.cc
index 833a3ae40b..7095675789 100644
--- a/mindspore/lite/tools/converter/converter_flags.cc
+++ b/mindspore/lite/tools/converter/converter_flags.cc
@@ -55,7 +55,7 @@ int Flags::Init(int argc, const char **argv) {
   if (err.IsSome()) {
     std::cerr << err.Get();
     std::cerr << this->Usage() << std::endl;
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
   if (this->help) {
@@ -64,21 +64,21 @@ int Flags::Init(int argc, const char **argv) {
   }
   if (this->modelFile.empty()) {
     std::cerr << "INPUT MISSING: model file path is necessary";
-    return 1;
+    return RET_INPUT_PARAM_LACK;
   }
   if (this->outputFile.empty()) {
     std::cerr << "INPUT MISSING: output file path is necessary";
-    return 1;
+    return RET_INPUT_PARAM_LACK;
   }
 
   if (this->outputFile.rfind('/') == this->outputFile.length() - 1) {
     std::cerr << "INPUT ILLEGAL: outputFile must be a valid file path";
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
   if (this->fmkIn.empty()) {
     std::cerr << "INPUT MISSING: fmk is necessary";
-    return 1;
+    return RET_INPUT_PARAM_LACK;
   }
   if (this->inputInferenceTypeIn == "FLOAT") {
     this->inputInferenceType = TypeId::kNumberTypeFloat;
@@ -87,7 +87,7 @@ int Flags::Init(int argc, const char **argv) {
   } else {
     std::cerr << "INPUT INVALID: inputInferenceType is invalid: %s, supported inputInferenceType: FLOAT | INT8",
       this->inputInferenceTypeIn.c_str();
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
   if (this->inferenceTypeIn == "FLOAT") {
@@ -97,7 +97,7 @@ int Flags::Init(int argc, const char **argv) {
   } else {
     std::cerr << "INPUT INVALID: inferenceType is invalid: %s, supported inferenceType: FLOAT | INT8",
       this->inferenceTypeIn.c_str();
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
   if (this->fmkIn == "CAFFE") {
@@ -110,12 +110,12 @@ int Flags::Init(int argc, const char **argv) {
     this->fmk = FmkType_ONNX;
   } else {
     std::cerr << "INPUT ILLEGAL: fmk must be TFLITE|CAFFE|MS|ONNX";
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
   if (this->fmk != FmkType_CAFFE && !weightFile.empty()) {
     std::cerr << "INPUT ILLEGAL: weightFile is not a valid flag";
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
   if (this->quantTypeIn == "AwareTraining") {
     this->quantType = QuantType_AwareTraining;
@@ -127,7 +127,7 @@ int Flags::Init(int argc, const char **argv) {
     this->quantType = QuantType_QUANT_NONE;
   } else {
     std::cerr << "INPUT ILLEGAL: quantType must be AwareTraining|WeightQuant|PostTraining";
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
 
 
@@ -137,9 +137,9 @@ int Flags::Init(int argc, const char **argv) {
     this->trainModel = false;
   } else {
     std::cerr << "INPUT ILLEGAL: trainModel must be true|false ";
-    return 1;
+    return RET_INPUT_PARAM_INVALID;
   }
-  return 0;
+  return RET_OK;
 }
 }  // namespace converter
 }  // namespace lite
diff --git a/mindspore/lite/tools/converter/parser/onnx/onnx_conv_parser.cc b/mindspore/lite/tools/converter/parser/onnx/onnx_conv_parser.cc
index 5a67a11abc..7a2a474eff 100644
--- a/mindspore/lite/tools/converter/parser/onnx/onnx_conv_parser.cc
+++ b/mindspore/lite/tools/converter/parser/onnx/onnx_conv_parser.cc
@@ -176,6 +176,9 @@ STATUS OnnxConvParser::Parse(const onnx::GraphProto &onnx_graph, const onnx::Nod
       MS_LOG(ERROR) << "Convert Convolution to Depthwise failed";
       return RET_ERROR;
     }
+  } else if (attr->group != 1) {
+    MS_LOG(ERROR) << "group conv hasn't supported";
+    return RET_NOT_SUPPORT;
   } else {
     op->primitive->value.type = schema::PrimitiveType_Conv2D;
     op->primitive->value.value = attr.release();
diff --git a/mindspore/lite/tools/converter/parser/onnx/onnx_lrn_parser.cc b/mindspore/lite/tools/converter/parser/onnx/onnx_lrn_parser.cc
index de1f234603..356df10005 100644
--- a/mindspore/lite/tools/converter/parser/onnx/onnx_lrn_parser.cc
+++ b/mindspore/lite/tools/converter/parser/onnx/onnx_lrn_parser.cc
@@ -78,5 +78,6 @@ STATUS OnnxLrnParser::Parse(const onnx::GraphProto &onnx_graph, const onnx::Node
 }
 
 OnnxNodeRegistrar g_onnxLrnxParser("Lrn", new OnnxLrnParser());
+OnnxNodeRegistrar g_onnxLRNxParser("LRN", new OnnxLrnParser());
 }  // namespace lite
 }  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_expand_dims_parser.cc b/mindspore/lite/tools/converter/parser/tflite/tflite_expand_dims_parser.cc
index 654f66c9b9..efa0f1d408 100644
--- a/mindspore/lite/tools/converter/parser/tflite/tflite_expand_dims_parser.cc
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_expand_dims_parser.cc
@@ -42,19 +42,19 @@ STATUS TfliteExpandDimsParser::Parse(const std::unique_ptr<tflite::OperatorT> &t
     MS_LOG(ERROR) << "new op failed";
     return RET_NULL_PTR;
   }
-
-  const auto &tflite_attr = tflite_op->builtin_options.AsExpandDimsOptions();
-  if (tflite_attr == nullptr) {
-    MS_LOG(ERROR) << "get op: " << op->name.c_str() << " attr failed";
-    return RET_NULL_PTR;
+  std::vector<int> dims;
+  if (GetTfliteData(tflite_op->inputs[1], tflite_tensors, tflite_model_buffer, dims)) {
+    MS_LOG(ERROR) << "get expand_dims -> dim failed";
+    return RET_ERROR;
   }
-
-  attr->dim = -1;
-
-  MS_LOG(ERROR) << "The attr dim is folded by TFLite.";
-  return RET_ERROR;
+  attr->dim = dims[0];
+  op->primitive->value.type = schema::PrimitiveType_ExpandDims;
+  op->primitive->value.value = attr.release();
+  AddOpInput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->inputs[0], tensors_id->size(),
+             tflite_tensors.size(), schema::Format::Format_NHWC);
+  AddOpOutput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->outputs[0], tensors_id->size(),
+              tflite_tensors.size(), schema::Format::Format_NHWC);
 }
-
 TfliteNodeRegister g_tfliteExpandDimsParser("ExpandDims", new TfliteExpandDimsParser());
 }  // namespace lite
 }  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.cc b/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.cc
new file mode 100644
index 0000000000..8e989ae164
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.cc
@@ -0,0 +1,63 @@
+/**
+ * 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 "tools/converter/parser/tflite/tflite_hashtable_lookup_parser.h"
+#include <vector>
+#include <memory>
+#include <map>
+
+namespace mindspore {
+namespace lite {
+STATUS TfliteHashtableLookupParser::Parse(const std::unique_ptr<tflite::OperatorT> &tflite_op,
+                                          const std::vector<std::unique_ptr<tflite::TensorT>> &tflite_tensors,
+                                          const std::vector<std::unique_ptr<tflite::BufferT>> &tflite_model_buffer,
+                                          schema::CNodeT *op, std::vector<int32_t> *tensors_id,
+                                          std::vector<schema::Format> *tensors_format,
+                                          std::map<int, int> *tensors_id_map) {
+  MS_LOG(DEBUG) << "parse TfliteHashtableLookupParser";
+  if (op == nullptr) {
+    MS_LOG(ERROR) << "op is null";
+    return RET_NULL_PTR;
+  }
+  op->primitive = std::make_unique<schema::PrimitiveT>();
+  if (op->primitive == nullptr) {
+    MS_LOG(ERROR) << "op->primitive is null";
+    return RET_NULL_PTR;
+  }
+
+  std::unique_ptr<schema::HashtableLookupT> attr = std::make_unique<schema::HashtableLookupT>();
+  if (attr == nullptr) {
+    MS_LOG(ERROR) << "new op failed";
+    return RET_NULL_PTR;
+  }
+
+  op->primitive->value.type = schema::PrimitiveType_HashtableLookup;
+  op->primitive->value.value = attr.release();
+  for (size_t i = 0; i < tflite_op->inputs.size(); ++i) {
+    AddOpInput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->inputs[i], tensors_id->size(),
+               tflite_tensors.size(), schema::Format::Format_NHWC);
+  }
+  for (size_t i = 0; i < tflite_op->outputs.size(); ++i) {
+    AddOpOutput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->outputs[i], tensors_id->size(),
+                tflite_tensors.size(), schema::Format::Format_NHWC);
+  }
+  return RET_OK;
+}
+
+TfliteNodeRegister g_tfliteHashtableLookupParser("HashtableLookup", new TfliteHashtableLookupParser());
+}  // namespace lite
+}  // namespace mindspore
+
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.h b/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.h
new file mode 100644
index 0000000000..0a37d9f259
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_hashtable_lookup_parser.h
@@ -0,0 +1,41 @@
+/**
+ * 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_TOOLS_CONVERTER_PARSER_TFLITE_HASHTABLE_LOOKUP_PARSER_H
+#define MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_TFLITE_HASHTABLE_LOOKUP_PARSER_H
+
+#include <memory>
+#include <vector>
+#include <map>
+#include "tools/converter/parser/tflite/tflite_node_parser.h"
+#include "tools/converter/parser/tflite/tflite_node_parser_registry.h"
+
+namespace mindspore {
+namespace lite {
+class TfliteHashtableLookupParser : public TfliteNodeParser {
+ public:
+  TfliteHashtableLookupParser() : TfliteNodeParser("HashtableLookup") {}
+
+  STATUS Parse(const std::unique_ptr<tflite::OperatorT> &tflite_op,
+               const std::vector<std::unique_ptr<tflite::TensorT>> &tflite_tensors,
+               const std::vector<std::unique_ptr<tflite::BufferT>> &tflite_model_buffer, schema::CNodeT *op,
+               std::vector<int32_t> *tensors_id, std::vector<schema::Format> *tensors_format,
+               std::map<int, int> *tensors_id_map) override;
+};
+}  // namespace lite
+}  // namespace mindspore
+
+#endif  // MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_TFLITE_HASHTABLE_LOOKUP_PARSER_H
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_pad_parser.cc b/mindspore/lite/tools/converter/parser/tflite/tflite_pad_parser.cc
index 0502afc269..3e50c489d4 100644
--- a/mindspore/lite/tools/converter/parser/tflite/tflite_pad_parser.cc
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_pad_parser.cc
@@ -42,18 +42,43 @@ STATUS TflitePadParser::Parse(const std::unique_ptr<tflite::OperatorT> &tflite_o
     MS_LOG(ERROR) << "new op failed";
     return RET_NULL_PTR;
   }
-
-  const auto &tflite_attr = tflite_op->builtin_options.AsPadOptions();
-  if (tflite_attr == nullptr) {
-    MS_LOG(ERROR) << "get op: " << op->name.c_str() << " attr failed";
-    return RET_NULL_PTR;
-  }
-
-  attr->paddingMode = schema::PaddingMode_CONSTANT;
-  attr->constantValue = 0.0f;
-  if (GetTfliteData(tflite_op->inputs[1], tflite_tensors, tflite_model_buffer, attr->paddings)) {
-    MS_LOG(ERROR) << "get pad -> paddings failed";
-    return RET_ERROR;
+  std::vector<std::string> node_name_str;
+  Split(op->name, &node_name_str, "-");
+  const char *node_name = node_name_str.data()->c_str();
+  if (std::strcmp(node_name, "Pad") == 0) {
+    const auto &tflite_attr = tflite_op->builtin_options.AsPadOptions();
+    if (tflite_attr == nullptr) {
+      MS_LOG(ERROR) << "get op: " << op->name.c_str() << " attr failed";
+      return RET_NULL_PTR;
+    }
+    attr->paddingMode = schema::PaddingMode_CONSTANT;
+    attr->constantValue = 0.0f;
+    if (GetTfliteData(tflite_op->inputs[1], tflite_tensors, tflite_model_buffer, attr->paddings)) {
+      MS_LOG(ERROR) << "get pad -> paddings failed";
+      return RET_ERROR;
+    }
+  } else if (std::strcmp(node_name, "MirrorPad") == 0) {
+    const auto &tflite_attr = tflite_op->builtin_options.AsMirrorPadOptions();
+    if (tflite_attr == nullptr) {
+      MS_LOG(ERROR) << "get op: " << op->name.c_str() << " attr failed";
+      return RET_NULL_PTR;
+    }
+    switch (tflite_attr->mode) {
+      case tflite::MirrorPadMode_REFLECT:
+        attr->paddingMode = schema::PaddingMode_REFLECT;
+        break;
+      case tflite::MirrorPadMode_SYMMETRIC:
+        attr->paddingMode = schema::PaddingMode_SYMMETRIC;
+        break;
+      default:
+        MS_LOG(ERROR) << "paddingmode:" << tflite_attr->mode << " don't support";
+        return RET_INVALID_OP_ATTR;
+      }
+    AddOpInput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->inputs[1], tensors_id->size(),
+               tflite_tensors.size(), schema::Format::Format_NHWC);
+  } else {
+    MS_LOG(ERROR) << "this pad:" << node_name << " hasn't been supported";
+    return RET_NOT_SUPPORT;
   }
 
   op->primitive->value.type = schema::PrimitiveType_Pad;
@@ -67,5 +92,6 @@ STATUS TflitePadParser::Parse(const std::unique_ptr<tflite::OperatorT> &tflite_o
 }
 
 TfliteNodeRegister g_tflitePadParser("Pad", new TflitePadParser());
+TfliteNodeRegister g_tfliteMirorPadParser("MirrorPad", new TflitePadParser());
 }  // namespace lite
 }  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.cc b/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.cc
new file mode 100644
index 0000000000..0329520140
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.cc
@@ -0,0 +1,67 @@
+/**
+ * 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 "tools/converter/parser/tflite/tflite_skip_gram_parser.h"
+#include <vector>
+#include <memory>
+#include <map>
+
+namespace mindspore {
+namespace lite {
+STATUS TfliteSkipGramParser::Parse(const std::unique_ptr<tflite::OperatorT> &tflite_op,
+                                   const std::vector<std::unique_ptr<tflite::TensorT>> &tflite_tensors,
+                                   const std::vector<std::unique_ptr<tflite::BufferT>> &tflite_model_buffer,
+                                   schema::CNodeT *op, std::vector<int32_t> *tensors_id,
+                                   std::vector<schema::Format> *tensors_format, std::map<int, int> *tensors_id_map) {
+  MS_LOG(DEBUG) << "parse TfliteSkipGramParser";
+  if (op == nullptr) {
+    MS_LOG(ERROR) << "op is null";
+    return RET_NULL_PTR;
+  }
+  op->primitive = std::make_unique<schema::PrimitiveT>();
+  if (op->primitive == nullptr) {
+    MS_LOG(ERROR) << "op->primitive is null";
+    return RET_NULL_PTR;
+  }
+
+  std::unique_ptr<schema::SkipGramT> attr = std::make_unique<schema::SkipGramT>();
+  if (attr == nullptr) {
+    MS_LOG(ERROR) << "new op failed";
+    return RET_NULL_PTR;
+  }
+
+  const auto &tflite_attr = tflite_op->builtin_options.AsSkipGramOptions();
+  if (tflite_attr == nullptr) {
+    MS_LOG(ERROR) << "get op: " << op->name << " attr failed";
+    return RET_NULL_PTR;
+  }
+  attr->includeAllGrams = tflite_attr->include_all_ngrams;
+  attr->maxSkipSize = tflite_attr->max_skip_size;
+  attr->ngramSize = tflite_attr->ngram_size;
+
+  op->primitive->value.type = schema::PrimitiveType_SkipGram;
+  op->primitive->value.value = attr.release();
+
+  AddOpInput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->inputs[0], tensors_id->size(),
+             tflite_tensors.size(), schema::Format::Format_NHWC);
+  AddOpOutput(op, tensors_id, tensors_format, tensors_id_map, tflite_op->outputs[0], tensors_id->size(),
+              tflite_tensors.size(), schema::Format::Format_NHWC);
+  return RET_OK;
+}
+
+TfliteNodeRegister g_TfliteSkiGramParser("SKipGram", new TfliteSkipGramParser());
+}  // namespace lite
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.h b/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.h
new file mode 100644
index 0000000000..5ebe6f5846
--- /dev/null
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_skip_gram_parser.h
@@ -0,0 +1,41 @@
+/**
+ * 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_TOOLS_CONVERTER_PARSER_TFLITE_SKIP_GRAM_PARSER_H
+#define MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_TFLITE_SKIP_GRAM_PARSER_H
+
+#include <memory>
+#include <vector>
+#include <map>
+#include "tools/converter/parser/tflite/tflite_node_parser.h"
+#include "tools/converter/parser/tflite/tflite_node_parser_registry.h"
+
+namespace mindspore {
+namespace lite {
+class TfliteSkipGramParser : public TfliteNodeParser {
+ public:
+  TfliteSkipGramParser() : TfliteNodeParser("SkipGram") {}
+
+  STATUS Parse(const std::unique_ptr<tflite::OperatorT> &tflite_op,
+               const std::vector<std::unique_ptr<tflite::TensorT>> &tflite_tensors,
+               const std::vector<std::unique_ptr<tflite::BufferT>> &tflite_model_buffer, schema::CNodeT *op,
+               std::vector<int32_t> *tensors_id, std::vector<schema::Format> *tensors_format,
+               std::map<int, int> *tensors_id_map) override;
+};
+}  // namespace lite
+}  // namespace mindspore
+
+#endif  // MINDSPORE_LITE_TOOLS_CONVERTER_PARSER_TFLITE_SKIP_GRAM_PARSER_H
diff --git a/mindspore/lite/tools/converter/parser/tflite/tflite_util.cc b/mindspore/lite/tools/converter/parser/tflite/tflite_util.cc
index 352003645e..a32ffaaefb 100644
--- a/mindspore/lite/tools/converter/parser/tflite/tflite_util.cc
+++ b/mindspore/lite/tools/converter/parser/tflite/tflite_util.cc
@@ -57,7 +57,7 @@ std::map<tflite::BuiltinOperator, std::string> tfMsOpTypeMap{
   {tflite::BuiltinOperator_POW, "Pow"},
   {tflite::BuiltinOperator_ARG_MIN, "Argmin"},
   {tflite::BuiltinOperator_CEIL, "Ceil"},
-  // {tflite::BuiltinOperator_EXPAND_DIMS, "ExpandDims"},
+  {tflite::BuiltinOperator_EXPAND_DIMS, "ExpandDims"},
   {tflite::BuiltinOperator_FILL, "Fill"},
   {tflite::BuiltinOperator_DIV, "Div"},
   {tflite::BuiltinOperator_FLOOR, "flOOR"},
@@ -117,6 +117,7 @@ std::map<tflite::BuiltinOperator, std::string> tfMsOpTypeMap{
   {tflite::BuiltinOperator_UNIQUE, "Unique"},
   {tflite::BuiltinOperator_UNPACK, "Unstack"},
   {tflite::BuiltinOperator_CUSTOM, "Custom"},
+  {tflite::BuiltinOperator_MIRROR_PAD, "MirrorPad"},
 };
 
 std::map<tflite::ActivationFunctionType, schema::ActivationType> tfMsActivationFunctionMap{
diff --git a/mindspore/lite/tools/converter/return_code.h b/mindspore/lite/tools/converter/return_code.h
index 9a0fc87e9f..be5df87c76 100644
--- a/mindspore/lite/tools/converter/return_code.h
+++ b/mindspore/lite/tools/converter/return_code.h
@@ -33,7 +33,7 @@ class ReturnCode {
       statusCode = status;
     }
   }
-  STATUS GetReturnCode() {
+  STATUS GetReturnCode() const {
     return statusCode;
   }
  private:
diff --git a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
index e6e8ec12d1..320ccc75a8 100644
--- a/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
+++ b/mindspore/lite/tools/optimizer/fusion/constant_folding_fusion.cc
@@ -85,8 +85,8 @@ ParameterPtr CreateNewParamter(const FuncGraphPtr &func_graph, Tensor *tensor) {
   param_value->set_tensor_type(type_id);
   param_value->set_format(tensor->GetFormat());
   if (tensor->MutableData() != nullptr) {
-    auto size = tensor->ElementsNum();
-    auto tensor_data = new (std::nothrow) float[size];
+    auto size = tensor->Size();
+    auto tensor_data = new (std::nothrow) uint8_t[size];
     if (tensor_data == nullptr) {
       MS_LOG(ERROR) << "tensor_data is nullptr";
       return nullptr;
@@ -98,7 +98,7 @@ ParameterPtr CreateNewParamter(const FuncGraphPtr &func_graph, Tensor *tensor) {
       return nullptr;
     }
     param_value->set_tensor_addr(tensor_data);
-    param_value->set_tensor_size(size * sizeof(float) / sizeof(uint8_t));
+    param_value->set_tensor_size(size);
   }
   parameter->set_default_param(param_value);
   return parameter;