diff --git a/mindspore/lite/src/common/common.h b/mindspore/lite/src/common/common.h
index 5cfb5671c6..58ecbfc3da 100644
--- a/mindspore/lite/src/common/common.h
+++ b/mindspore/lite/src/common/common.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_COMMON_H_
-#define MINDSPORE_LITE_COMMON_COMMON_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_COMMON_H_
+#define MINDSPORE_LITE_SRC_COMMON_COMMON_H_
 
 #include <string>
 #include "src/tensor.h"
@@ -56,4 +56,4 @@ static const schema::Format DEFAULT_FORMAT = schema::Format::Format_NCHW;
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_LITE_COMMON_COMMON_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_COMMON_H_
diff --git a/mindspore/lite/src/common/file_utils.h b/mindspore/lite/src/common/file_utils.h
index 46475fcd26..fbd7668e2e 100644
--- a/mindspore/lite/src/common/file_utils.h
+++ b/mindspore/lite/src/common/file_utils.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_FILE_UTILS_H_
-#define MINDSPORE_LITE_COMMON_FILE_UTILS_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_FILE_UTILS_H_
+#define MINDSPORE_LITE_SRC_COMMON_FILE_UTILS_H_
 
 #include <cstdio>
 #include <cstdlib>
@@ -48,13 +48,14 @@ void WriteToTxt(const std::string &file_path, void *data, size_t element_size) {
   out_file.close();
 }
 
-inline int WriteToBin(const std::string &file_path, void *data, size_t size) {
+inline int WriteToBin(const std::string &file_path, void *data, const size_t size) {
   std::ofstream out_file;
   out_file.open(file_path.c_str(), std::ios::binary);
   if (!out_file.good() || !out_file.is_open()) {
     return -1;
   }
   out_file.write(reinterpret_cast<char *>(data), size);
+  out_file.close();
   return 0;
 }
 
@@ -63,4 +64,4 @@ std::string GetAndroidPackagePath();
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_LITE_COMMON_FILE_UTILS_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_FILE_UTILS_H_
diff --git a/mindspore/lite/src/common/graph_util.h b/mindspore/lite/src/common/graph_util.h
index 0fdebcd46d..b6c566771d 100644
--- a/mindspore/lite/src/common/graph_util.h
+++ b/mindspore/lite/src/common/graph_util.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_GRAPH_UTIL_H_
-#define MINDSPORE_LITE_COMMON_GRAPH_UTIL_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_GRAPH_UTIL_H_
+#define MINDSPORE_LITE_SRC_COMMON_GRAPH_UTIL_H_
 
 #include <string>
 #include <unordered_map>
@@ -35,8 +35,8 @@ std::vector<size_t> GetGraphInputNodes(const lite::Model *model);
 
 std::vector<size_t> GetGraphOutputNodes(const lite::Model *model);
 
-std::vector<size_t> GetLinkedPostNodeIdx(const lite::Model *model, const size_t tensor_idx);
+std::vector<size_t> GetLinkedPostNodeIdx(const lite::Model *model, size_t tensor_idx);
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_LITE_COMMON_GRAPH_UTIL_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_GRAPH_UTIL_H_
diff --git a/mindspore/lite/src/common/log_adapter.h b/mindspore/lite/src/common/log_adapter.h
index 55be4c3ff7..e9b4667a1d 100644
--- a/mindspore/lite/src/common/log_adapter.h
+++ b/mindspore/lite/src/common/log_adapter.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_LOG_ADAPTER_H_
-#define MINDSPORE_LITE_COMMON_LOG_ADAPTER_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_LOG_ADAPTER_H_
+#define MINDSPORE_LITE_SRC_COMMON_LOG_ADAPTER_H_
 #ifdef USE_GLOG
 #include "utils/log_adapter.h"
 #else
@@ -113,4 +113,4 @@ class LogWriter {
 #define MS_ASSERT(f) ((void)0)
 #endif
 #endif
-#endif  // MINDSPORE_LITE_COMMON_LOG_ADAPTER_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_LOG_ADAPTER_H_
diff --git a/mindspore/lite/src/common/string_util.h b/mindspore/lite/src/common/string_util.h
index f97f345f1b..309c013512 100644
--- a/mindspore/lite/src/common/string_util.h
+++ b/mindspore/lite/src/common/string_util.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_STRING_UTIL_H_
-#define MINDSPORE_LITE_COMMON_STRING_UTIL_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_STRING_UTIL_H_
+#define MINDSPORE_LITE_SRC_COMMON_STRING_UTIL_H_
 
 #include <vector>
 #include <string>
@@ -52,4 +52,4 @@ uint64_t StringHash64(const char *s, size_t len);
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_LITE_COMMON_STRING_UTIL_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_STRING_UTIL_H_
diff --git a/mindspore/lite/src/common/utils.h b/mindspore/lite/src/common/utils.h
index 445d970491..7b43164bb2 100644
--- a/mindspore/lite/src/common/utils.h
+++ b/mindspore/lite/src/common/utils.h
@@ -14,10 +14,9 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_COMMON_UTILS_H_
-#define MINDSPORE_LITE_COMMON_UTILS_H_
+#ifndef MINDSPORE_LITE_SRC_COMMON_UTILS_H_
+#define MINDSPORE_LITE_SRC_COMMON_UTILS_H_
 
-#include <stdint.h>
 #include <ctime>
 #include <cstdint>
 #include <vector>
@@ -185,4 +184,4 @@ inline Option<bool> GenericParseValue(const std::string &value) {
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_LITE_COMMON_UTILS_H_
+#endif  // MINDSPORE_LITE_SRC_COMMON_UTILS_H_
diff --git a/mindspore/lite/src/executor.h b/mindspore/lite/src/executor.h
index 8a033cf846..d9bfd6ae9b 100644
--- a/mindspore/lite/src/executor.h
+++ b/mindspore/lite/src/executor.h
@@ -35,7 +35,7 @@ class Executor {
                   const KernelCallBack &before = nullptr, const KernelCallBack &after = nullptr);
 
  protected:
-  int CheckInputs(std::vector<Tensor *> &in_tensors);
+  static int CheckInputs(std::vector<Tensor *> &in_tensors);
 };
 }  // namespace mindspore::lite
 #endif
diff --git a/mindspore/lite/src/inner_context.cc b/mindspore/lite/src/inner_context.cc
index 0148182439..76ce01761b 100644
--- a/mindspore/lite/src/inner_context.cc
+++ b/mindspore/lite/src/inner_context.cc
@@ -52,10 +52,10 @@ int InnerContext::Init() {
 }
 
 InnerContext::~InnerContext() {
-  if (this->thread_pool_ != NULL) {
+  if (this->thread_pool_ != nullptr) {
     DestroyThreadPool(this->thread_pool_);
     free(this->thread_pool_);
-    this->thread_pool_ = NULL;
+    this->thread_pool_ = nullptr;
   }
 }
 
diff --git a/mindspore/lite/src/kernel_registry.cc b/mindspore/lite/src/kernel_registry.cc
index 4dcc1ee116..ebdc27a739 100644
--- a/mindspore/lite/src/kernel_registry.cc
+++ b/mindspore/lite/src/kernel_registry.cc
@@ -73,7 +73,7 @@ int KernelRegistry::GetCreatorFuncIndex(const kernel::KernelKey desc) {
   return index;
 }
 
-void KernelRegistry::RegKernel(const KernelKey desc, kernel::KernelCreator creator) {
+void KernelRegistry::RegKernel(const KernelKey desc, const kernel::KernelCreator creator) {
   int index = GetCreatorFuncIndex(desc);
   if (index >= array_size_) {
     MS_LOG(ERROR) << "invalid kernel key, arch " << desc.arch << ", data_type" << desc.data_type << ",op type "
@@ -97,8 +97,6 @@ void KernelRegistry::RegKernel(const KERNEL_ARCH arch, const TypeId data_type, c
 
 bool KernelRegistry::Merge(const std::unordered_map<KernelKey, KernelCreator> &new_creators) { return false; }
 
-const kernel::KernelCreator *KernelRegistry::GetCreatorArrays() { return creator_arrays_; }
-
 kernel::LiteKernel *KernelRegistry::GetKernel(const std::vector<Tensor *> &in_tensors,
                                               const std::vector<Tensor *> &out_tensors, const PrimitiveC *primitive,
                                               const InnerContext *ctx, const kernel::KernelKey &key) {
@@ -124,5 +122,5 @@ kernel::LiteKernel *KernelRegistry::GetKernel(const std::vector<Tensor *> &in_te
   return nullptr;
 }
 
-KernelRegistry::~KernelRegistry() {}
+KernelRegistry::~KernelRegistry() = default;
 }  // namespace mindspore::lite
diff --git a/mindspore/lite/src/kernel_registry.h b/mindspore/lite/src/kernel_registry.h
index c1df68cb49..508da3762d 100644
--- a/mindspore/lite/src/kernel_registry.h
+++ b/mindspore/lite/src/kernel_registry.h
@@ -35,7 +35,7 @@ class KernelRegistry {
   virtual ~KernelRegistry();
 
   static KernelRegistry *GetInstance();
-  int Init();
+  static int Init();
   virtual kernel::KernelCreator GetCreator(const kernel::KernelKey &desc);
   const kernel::KernelCreator *GetCreatorArrays();
   int GetCreatorFuncIndex(kernel::KernelKey desc);
diff --git a/mindspore/lite/src/lite_kernel.cc b/mindspore/lite/src/lite_kernel.cc
index a8e5e0fd71..26648adc0c 100644
--- a/mindspore/lite/src/lite_kernel.cc
+++ b/mindspore/lite/src/lite_kernel.cc
@@ -93,7 +93,12 @@ int LiteKernel::PreProcess() {
   auto outputs = this->out_tensors();
   for (auto *output : outputs) {
     MS_ASSERT(output != nullptr);
-    output->MallocData();
+
+    auto ret = output->MallocData();
+    if (ret != RET_OK) {
+      MS_LOG(ERROR) << "MallocData failed";
+      return ret;
+    }
   }
   return RET_OK;
 }
@@ -308,5 +313,5 @@ void LiteKernelUtil::InitTensorRefCount(std::vector<kernel::LiteKernel *> &kerne
   }
 }
 
-int LiteKernelUtil::SetInput(LiteKernel &kernelMod, std::vector<lite::Tensor *> inputs) { return -1; }
+int LiteKernelUtil::SetInput(LiteKernel &kernelMod, const std::vector<lite::Tensor *> &inputs) { return -1; }
 }  // namespace mindspore::kernel
diff --git a/mindspore/lite/src/lite_kernel.h b/mindspore/lite/src/lite_kernel.h
index 4bdc1d7e13..ffb659fa15 100644
--- a/mindspore/lite/src/lite_kernel.h
+++ b/mindspore/lite/src/lite_kernel.h
@@ -217,7 +217,7 @@ class LiteKernelUtil {
 
   static void InitTensorRefCount(std::vector<kernel::LiteKernel *> &kernels);
 
-  static int SetInput(LiteKernel &kernelMod, std::vector<lite::Tensor *> inputs);
+  static int SetInput(LiteKernel &kernelMod, const std::vector<lite::Tensor *> &inputs);
 };
 }  // namespace mindspore::kernel
 
diff --git a/mindspore/lite/src/lite_session.cc b/mindspore/lite/src/lite_session.cc
index 7f5e43d2c6..37c9a25780 100644
--- a/mindspore/lite/src/lite_session.cc
+++ b/mindspore/lite/src/lite_session.cc
@@ -571,7 +571,11 @@ int LiteSession::Resize(const std::vector<mindspore::tensor::MSTensor *> &inputs
 }  // namespace lite
 
 session::LiteSession *session::LiteSession::CreateSession(const lite::Context *context) {
-  auto session = new lite::LiteSession();
+  auto session = new (std::nothrow) lite::LiteSession();
+  if (session == nullptr) {
+    MS_LOG(ERROR) << "create sesssion failed";
+    return nullptr;
+  }
   auto ret = session->Init(context);
   if (ret != mindspore::lite::RET_OK) {
     MS_LOG(ERROR) << "init sesssion failed";
diff --git a/mindspore/lite/src/lite_session.h b/mindspore/lite/src/lite_session.h
index 2479784e5c..cbd87802b6 100644
--- a/mindspore/lite/src/lite_session.h
+++ b/mindspore/lite/src/lite_session.h
@@ -66,7 +66,7 @@ class LiteSession : public session::LiteSession {
              const std::vector<std::vector<int>> &dims) override;
 
  protected:
-  void ConvertTensorsQuantParam(const schema::Tensor *src_tensor, lite::Tensor *dst_tensor);
+  static void ConvertTensorsQuantParam(const schema::Tensor *src_tensor, lite::Tensor *dst_tensor);
 
   int ConvertTensorsData(const lite::Model *model, size_t tensor_index, const schema::Tensor *src_tensor,
                          lite::Tensor *dst_tensor);
diff --git a/mindspore/lite/src/ops/pooling_grad.cc b/mindspore/lite/src/ops/pooling_grad.cc
index c871c5effd..e27360deaf 100644
--- a/mindspore/lite/src/ops/pooling_grad.cc
+++ b/mindspore/lite/src/ops/pooling_grad.cc
@@ -198,11 +198,9 @@ int PoolingGrad::InferShape(std::vector<Tensor *> inputs_, std::vector<Tensor *>
     }
   }
   auto grad_output = outputs_.at(0);
-  // todo: fmk type
   auto output_shape = input->shape();
   grad_output->set_shape(output_shape);
   grad_output->set_data_type(input->data_type());
-  // todo: temp fix
   grad_output->set_format(input->format());
   return RET_OK;
 }
diff --git a/mindspore/lite/src/ops/primitive_c.cc b/mindspore/lite/src/ops/primitive_c.cc
index 08ed5d49bd..29601793c6 100644
--- a/mindspore/lite/src/ops/primitive_c.cc
+++ b/mindspore/lite/src/ops/primitive_c.cc
@@ -266,8 +266,8 @@ void PrimitiveC::PopulaterInputQuantParam(const Primitive &prim, const std::vect
   if (filterMin != nullptr && filterMax != nullptr) {
     auto filterMinPtr = filterMin->cast<TensorPtr>();
     auto filterMaxPtr = filterMax->cast<TensorPtr>();
-    float *minBuf = static_cast<float *>(filterMinPtr->data_c());
-    float *maxBuf = static_cast<float *>(filterMaxPtr->data_c());
+    auto *minBuf = static_cast<float *>(filterMinPtr->data_c());
+    auto *maxBuf = static_cast<float *>(filterMaxPtr->data_c());
     quantParam.min = FLT_MAX;
     quantParam.max = FLT_MIN;
     for (int i = 0; i < filterMinPtr->ElementsNum(); ++i) {
@@ -296,8 +296,8 @@ void PrimitiveC::PopulaterOutputQuantParam(const Primitive &prim, bool narrowRan
   if (outputMin != nullptr && outputMax != nullptr) {
     auto outputMinPtr = outputMin->cast<TensorPtr>();
     auto outputMaxPtr = outputMax->cast<TensorPtr>();
-    float *minBuf = static_cast<float *>(outputMinPtr->data_c());
-    float *maxBuf = static_cast<float *>(outputMaxPtr->data_c());
+    auto *minBuf = static_cast<float *>(outputMinPtr->data_c());
+    auto *maxBuf = static_cast<float *>(outputMaxPtr->data_c());
     quantParam.min = *minBuf;
     quantParam.max = *maxBuf;
     auto ret = quant::CalQuantizationParams(&quantParam, quantParam.min, quantParam.max, narrowRangeQuantParam,
@@ -317,14 +317,14 @@ void PrimitiveC::PopulaterOutputQuantParam(const Primitive &prim, bool narrowRan
 
 void PrimitiveC::PopulaterQuantParam(const Primitive &prim, const std::vector<AnfNodePtr> &inputs) {
   auto narrow_range = prim.GetAttr("narrow_range");
-  bool narrowRangeQuantParam = narrow_range != nullptr ? GetValue<bool>(narrow_range) : false;
+  bool narrowRangeQuantParam = narrow_range != nullptr && GetValue<bool>(narrow_range);
   auto num_bits = prim.GetAttr("num_bits");
   int32_t numbitsRangeQuantParam = num_bits != nullptr ? GetValue<int64_t>(num_bits) : 8;
   PopulaterInputQuantParam(prim, inputs, narrowRangeQuantParam, numbitsRangeQuantParam);
   PopulaterOutputQuantParam(prim, narrowRangeQuantParam, numbitsRangeQuantParam);
 }
 
-void PrimitiveC::GetAttrDataFromInput(const AnfNodePtr inputNode, std::vector<int> *data) {
+void PrimitiveC::GetAttrDataFromInput(const AnfNodePtr &inputNode, std::vector<int> *data) {
   if (inputNode->isa<ValueNode>()) {
     auto valNode = inputNode->cast<ValueNodePtr>();
     MS_ASSERT(valNode != nullptr);
@@ -394,12 +394,12 @@ void PrimitiveC::ClearInputOutputQuantParam() {
   output_quant_param_.clear();
 }
 
-void PrimitiveC::AddInputQuantParam(std::vector<schema::QuantParamT> quant_param) {
+void PrimitiveC::AddInputQuantParam(const std::vector<schema::QuantParamT> &quant_param) {
   this->input_quant_param_.emplace_back(quant_param);
 }
 std::vector<std::vector<schema::QuantParamT>> PrimitiveC::input_quant_params() const { return input_quant_param_; }
 
-void PrimitiveC::AddOutputQuantParam(std::vector<schema::QuantParamT> quant_param) {
+void PrimitiveC::AddOutputQuantParam(const std::vector<schema::QuantParamT> &quant_param) {
   this->output_quant_param_.emplace_back(quant_param);
 }
 std::vector<std::vector<schema::QuantParamT>> PrimitiveC::output_quant_params() const { return output_quant_param_; }
@@ -415,7 +415,7 @@ std::shared_ptr<PrimitiveC> GetReturnPrim() {
     return nullptr;
   }
   return_primitiveT->value.type = schema::PrimitiveType_Return;
-  return_primitiveT->value.value = new schema::ReturnT;
+  return_primitiveT->value.value = new (std::nothrow) schema::ReturnT;
   if (return_primitiveT->value.value == nullptr) {
     MS_LOG(ERROR) << "new ReturnT failed";
     delete (return_primitiveT);
@@ -425,13 +425,13 @@ std::shared_ptr<PrimitiveC> GetReturnPrim() {
 }
 
 std::shared_ptr<PrimitiveC> GetMakeTuplePrim() {
-  auto make_tuple_primitiveT = new schema::PrimitiveT;
+  auto make_tuple_primitiveT = new (std::nothrow) schema::PrimitiveT;
   if (make_tuple_primitiveT == nullptr) {
     MS_LOG(ERROR) << "new PrimitiveT failed";
     return nullptr;
   }
   make_tuple_primitiveT->value.type = schema::PrimitiveType_MakeTuple;
-  make_tuple_primitiveT->value.value = new schema::MakeTupleT;
+  make_tuple_primitiveT->value.value = new (std::nothrow) schema::MakeTupleT;
   if (make_tuple_primitiveT->value.value == nullptr) {
     MS_LOG(ERROR) << "new MakeTupleT failed";
     delete (make_tuple_primitiveT);
@@ -441,13 +441,13 @@ std::shared_ptr<PrimitiveC> GetMakeTuplePrim() {
 }
 
 std::shared_ptr<PrimitiveC> GetTupleGetItemPrim() {
-  auto tuple_get_item_primitiveT = new schema::PrimitiveT();
+  auto tuple_get_item_primitiveT = new (std::nothrow) schema::PrimitiveT();
   if (tuple_get_item_primitiveT == nullptr) {
     MS_LOG(ERROR) << "new PrimitiveT failed";
     return nullptr;
   }
   tuple_get_item_primitiveT->value.type = schema::PrimitiveType_TupleGetItem;
-  tuple_get_item_primitiveT->value.value = new schema::TupleGetItemT;
+  tuple_get_item_primitiveT->value.value = new (std::nothrow) schema::TupleGetItemT;
   if (tuple_get_item_primitiveT->value.value == nullptr) {
     MS_LOG(ERROR) << "new TupleGetItemT failed";
     delete (tuple_get_item_primitiveT);
@@ -642,316 +642,316 @@ PrimitiveC *PrimitiveC::Create(mindspore::schema::PrimitiveT *primitive) {
   auto op_type = primitive->value.type;
   switch (op_type) {
     case schema::PrimitiveType_SoftMax:
-      return new SoftMax(primitive);
+      return new (std::nothrow) SoftMax(primitive);
     case schema::PrimitiveType_Activation:
-      return new Activation(primitive);
+      return new (std::nothrow) Activation(primitive);
     case schema::PrimitiveType_Conv2D:
-      return new Conv2D(primitive);
+      return new (std::nothrow) Conv2D(primitive);
     case schema::PrimitiveType_DeConv2D:
-      return new DeConv2D(primitive);
+      return new (std::nothrow) DeConv2D(primitive);
     case schema::PrimitiveType_Reduce:
-      return new Reduce(primitive);
+      return new (std::nothrow) Reduce(primitive);
     case schema::PrimitiveType_Pooling:
-      return new Pooling(primitive);
+      return new (std::nothrow) Pooling(primitive);
     case schema::PrimitiveType_ROIPooling:
-      return new ROIPooling(primitive);
+      return new (std::nothrow) ROIPooling(primitive);
     case schema::PrimitiveType_DepthwiseConv2D:
-      return new DepthwiseConv2D(primitive);
+      return new (std::nothrow) DepthwiseConv2D(primitive);
     case schema::PrimitiveType_FusedBatchNorm:
-      return new FusedBatchNorm(primitive);
+      return new (std::nothrow) FusedBatchNorm(primitive);
     case schema::PrimitiveType_BatchNorm:
-      return new BatchNorm(primitive);
+      return new (std::nothrow) BatchNorm(primitive);
     case schema::PrimitiveType_FullConnection:
-      return new FullConnection(primitive);
+      return new (std::nothrow) FullConnection(primitive);
     case schema::PrimitiveType_Power:
-      return new Power(primitive);
+      return new (std::nothrow) Power(primitive);
     case schema::PrimitiveType_Pad:
-      return new Pad(primitive);
+      return new (std::nothrow) Pad(primitive);
     case schema::PrimitiveType_Range:
-      return new Range(primitive);
+      return new (std::nothrow) Range(primitive);
     case schema::PrimitiveType_Mul:
-      return new Mul(primitive);
+      return new (std::nothrow) Mul(primitive);
     case schema::PrimitiveType_Add:
-      return new Add(primitive);
+      return new (std::nothrow) Add(primitive);
     case schema::PrimitiveType_Sub:
-      return new Sub(primitive);
+      return new (std::nothrow) Sub(primitive);
     case schema::PrimitiveType_Div:
-      return new Div(primitive);
+      return new (std::nothrow) Div(primitive);
     case schema::PrimitiveType_BiasAdd:
-      return new BiasAdd(primitive);
+      return new (std::nothrow) BiasAdd(primitive);
     case schema::PrimitiveType_ExpandDims:
-      return new ExpandDims(primitive);
+      return new (std::nothrow) ExpandDims(primitive);
     case schema::PrimitiveType_ArgMax:
-      return new ArgMax(primitive);
+      return new (std::nothrow) ArgMax(primitive);
     case schema::PrimitiveType_ArgMin:
-      return new ArgMin(primitive);
+      return new (std::nothrow) ArgMin(primitive);
     case schema::PrimitiveType_Cast:
-      return new Cast(primitive);
+      return new (std::nothrow) Cast(primitive);
     case schema::PrimitiveType_Reshape:
-      return new Reshape(primitive);
+      return new (std::nothrow) Reshape(primitive);
     case schema::PrimitiveType_Scale:
-      return new Scale(primitive);
+      return new (std::nothrow) Scale(primitive);
     case schema::PrimitiveType_Eltwise:
-      return new Eltwise(primitive);
+      return new (std::nothrow) Eltwise(primitive);
     case schema::PrimitiveType_Ceil:
-      return new Ceil(primitive);
+      return new (std::nothrow) Ceil(primitive);
     case schema::PrimitiveType_Concat:
-      return new Concat(primitive);
+      return new (std::nothrow) Concat(primitive);
     case schema::PrimitiveType_Fill:
-      return new Fill(primitive);
+      return new (std::nothrow) Fill(primitive);
     case schema::PrimitiveType_Nhwc2Nchw:
-      return new Nhwc2Nchw(primitive);
+      return new (std::nothrow) Nhwc2Nchw(primitive);
     case schema::PrimitiveType_Nchw2Nhwc:
-      return new Nchw2Nhwc(primitive);
+      return new (std::nothrow) Nchw2Nhwc(primitive);
     case schema::PrimitiveType_Transpose:
-      return new Transpose(primitive);
+      return new (std::nothrow) Transpose(primitive);
     case schema::PrimitiveType_Slice:
-      return new Slice(primitive);
+      return new (std::nothrow) Slice(primitive);
     case schema::PrimitiveType_Squeeze:
-      return new Squeeze(primitive);
+      return new (std::nothrow) Squeeze(primitive);
     case schema::PrimitiveType_Flatten:
-      return new Flatten(primitive);
+      return new (std::nothrow) Flatten(primitive);
     case schema::PrimitiveType_Mean:
-      return new Mean(primitive);
+      return new (std::nothrow) Mean(primitive);
     case schema::PrimitiveType_Stack:
-      return new Stack(primitive);
+      return new (std::nothrow) Stack(primitive);
     case schema::PrimitiveType_Crop:
-      return new Crop(primitive);
+      return new (std::nothrow) Crop(primitive);
     case schema::PrimitiveType_SquaredDifference:
-      return new SquaredDifference(primitive);
+      return new (std::nothrow) SquaredDifference(primitive);
     case schema::PrimitiveType_AddN:
-      return new AddN(primitive);
+      return new (std::nothrow) AddN(primitive);
     case schema::PrimitiveType_Abs:
-      return new Abs(primitive);
+      return new (std::nothrow) Abs(primitive);
     case schema::PrimitiveType_Sin:
-      return new Sin(primitive);
+      return new (std::nothrow) Sin(primitive);
     case schema::PrimitiveType_Cos:
-      return new Cos(primitive);
+      return new (std::nothrow) Cos(primitive);
     case schema::PrimitiveType_Log:
-      return new Log(primitive);
+      return new (std::nothrow) Log(primitive);
     case schema::PrimitiveType_Sqrt:
-      return new Sqrt(primitive);
+      return new (std::nothrow) Sqrt(primitive);
     case schema::PrimitiveType_Rsqrt:
-      return new Rsqrt(primitive);
+      return new (std::nothrow) Rsqrt(primitive);
     case schema::PrimitiveType_Square:
-      return new Square(primitive);
+      return new (std::nothrow) Square(primitive);
     case schema::PrimitiveType_Exp:
-      return new Exp(primitive);
+      return new (std::nothrow) Exp(primitive);
     case schema::PrimitiveType_Gather:
-      return new Gather(primitive);
+      return new (std::nothrow) Gather(primitive);
     case schema::PrimitiveType_GatherNd:
-      return new GatherNd(primitive);
+      return new (std::nothrow) GatherNd(primitive);
     case schema::PrimitiveType_LocalResponseNormalization:
-      return new LocalResponseNormalization(primitive);
+      return new (std::nothrow) LocalResponseNormalization(primitive);
     case schema::PrimitiveType_Maximum:
-      return new Maximum(primitive);
+      return new (std::nothrow) Maximum(primitive);
     case schema::PrimitiveType_Minimum:
-      return new Minimum(primitive);
+      return new (std::nothrow) Minimum(primitive);
     case schema::PrimitiveType_StridedSlice:
-      return new StridedSlice(primitive);
+      return new (std::nothrow) StridedSlice(primitive);
     case schema::PrimitiveType_LeakyReLU:
       return new (std::nothrow) LeakyReLU(primitive);
     case schema::PrimitiveType_PReLU:
       return new (std::nothrow) PReLU(primitive);
     case schema::PrimitiveType_Round:
-      return new Round(primitive);
+      return new (std::nothrow) Round(primitive);
     case schema::PrimitiveType_Reverse:
-      return new Reverse(primitive);
+      return new (std::nothrow) Reverse(primitive);
     case schema::PrimitiveType_ReverseSequence:
-      return new ReverseSequence(primitive);
+      return new (std::nothrow) ReverseSequence(primitive);
     case schema::PrimitiveType_LogicalAnd:
-      return new LogicalAnd(primitive);
+      return new (std::nothrow) LogicalAnd(primitive);
     case schema::PrimitiveType_LogicalOr:
-      return new LogicalOr(primitive);
+      return new (std::nothrow) LogicalOr(primitive);
     case schema::PrimitiveType_LogicalNot:
-      return new LogicalNot(primitive);
+      return new (std::nothrow) LogicalNot(primitive);
     case schema::PrimitiveType_FloorDiv:
-      return new FloorDiv(primitive);
+      return new (std::nothrow) FloorDiv(primitive);
     case schema::PrimitiveType_FloorMod:
-      return new FloorMod(primitive);
+      return new (std::nothrow) FloorMod(primitive);
     case schema::PrimitiveType_Equal:
-      return new Equal(primitive);
+      return new (std::nothrow) Equal(primitive);
     case schema::PrimitiveType_NotEqual:
-      return new NotEqual(primitive);
+      return new (std::nothrow) NotEqual(primitive);
     case schema::PrimitiveType_Less:
-      return new Less(primitive);
+      return new (std::nothrow) Less(primitive);
     case schema::PrimitiveType_LessEqual:
-      return new LessEqual(primitive);
+      return new (std::nothrow) LessEqual(primitive);
     case schema::PrimitiveType_Greater:
-      return new Greater(primitive);
+      return new (std::nothrow) Greater(primitive);
     case schema::PrimitiveType_GreaterEqual:
-      return new GreaterEqual(primitive);
+      return new (std::nothrow) GreaterEqual(primitive);
     case schema::PrimitiveType_Floor:
-      return new Floor(primitive);
+      return new (std::nothrow) Floor(primitive);
     case schema::PrimitiveType_Split:
-      return new Split(primitive);
+      return new (std::nothrow) Split(primitive);
     case schema::PrimitiveType_OneHot:
-      return new OneHot(primitive);
+      return new (std::nothrow) OneHot(primitive);
     case schema::PrimitiveType_PriorBox:
-      return new PriorBox(primitive);
+      return new (std::nothrow) PriorBox(primitive);
     case schema::PrimitiveType_SpaceToDepth:
-      return new SpaceToDepth(primitive);
+      return new (std::nothrow) SpaceToDepth(primitive);
     case schema::PrimitiveType_Tile:
-      return new Tile(primitive);
+      return new (std::nothrow) Tile(primitive);
     case schema::PrimitiveType_Resize:
-      return new Resize(primitive);
+      return new (std::nothrow) Resize(primitive);
     case schema::PrimitiveType_Unstack:
-      return new Unstack(primitive);
+      return new (std::nothrow) Unstack(primitive);
     case schema::PrimitiveType_Unique:
-      return new Unique(primitive);
+      return new (std::nothrow) Unique(primitive);
     case schema::PrimitiveType_TopK:
-      return new TopK(primitive);
+      return new (std::nothrow) TopK(primitive);
     case schema::PrimitiveType_MatMul:
-      return new MatMul(primitive);
+      return new (std::nothrow) MatMul(primitive);
     case schema::PrimitiveType_QuantDTypeCast:
-      return new QuantDTypeCast(primitive);
+      return new (std::nothrow) QuantDTypeCast(primitive);
     case schema::PrimitiveType_EmbeddingLookup:
-      return new EmbeddingLookup(primitive);
+      return new (std::nothrow) EmbeddingLookup(primitive);
     case schema::PrimitiveType_Elu:
-      return new Elu(primitive);
+      return new (std::nothrow) Elu(primitive);
     case schema::PrimitiveType_DeDepthwiseConv2D:
-      return new DeDepthwiseConv2D(primitive);
+      return new (std::nothrow) DeDepthwiseConv2D(primitive);
     case schema::PrimitiveType_Shape:
-      return new Shape(primitive);
+      return new (std::nothrow) Shape(primitive);
     case schema::PrimitiveType_Unsqueeze:
-      return new Unsqueeze(primitive);
+      return new (std::nothrow) Unsqueeze(primitive);
     case schema::PrimitiveType_BatchToSpace:
     case schema::PrimitiveType_BatchToSpaceND:
-      return new BatchToSpace(primitive);
+      return new (std::nothrow) BatchToSpace(primitive);
     case schema::PrimitiveType_SpaceToBatch:
-      return new SpaceToBatch(primitive);
+      return new (std::nothrow) SpaceToBatch(primitive);
     case schema::PrimitiveType_SpaceToBatchND:
-      return new SpaceToBatchND(primitive);
+      return new (std::nothrow) SpaceToBatchND(primitive);
     case schema::PrimitiveType_BroadcastTo:
-      return new BroadcastTo(primitive);
+      return new (std::nothrow) BroadcastTo(primitive);
     case schema::PrimitiveType_DepthToSpace:
-      return new DepthToSpace(primitive);
+      return new (std::nothrow) DepthToSpace(primitive);
     case schema::PrimitiveType_Lstm:
-      return new Lstm(primitive);
+      return new (std::nothrow) Lstm(primitive);
     case schema::PrimitiveType_ZerosLike:
-      return new ZerosLike(primitive);
+      return new (std::nothrow) ZerosLike(primitive);
     case schema::PrimitiveType_MakeTuple:
-      return new MakeTuple(primitive);
+      return new (std::nothrow) MakeTuple(primitive);
     case schema::PrimitiveType_Where:
-      return new Where(primitive);
+      return new (std::nothrow) Where(primitive);
     case schema::PrimitiveType_ScatterND:
-      return new ScatterND(primitive);
+      return new (std::nothrow) ScatterND(primitive);
     case schema::PrimitiveType_ConstantOfShape:
-      return new ConstantOfShape(primitive);
+      return new (std::nothrow) ConstantOfShape(primitive);
     case schema::PrimitiveType_L2Norm:
-      return new L2Norm(primitive);
+      return new (std::nothrow) L2Norm(primitive);
     case schema::PrimitiveType_SparseToDense:
-      return new SparseToDense(primitive);
+      return new (std::nothrow) SparseToDense(primitive);
     case schema::PrimitiveType_DetectionPostProcess:
-      return new DetectionPostProcess(primitive);
+      return new (std::nothrow) DetectionPostProcess(primitive);
     case schema::PrimitiveType_Dropout:
-      return new Dropout(primitive);
+      return new (std::nothrow) Dropout(primitive);
     case schema::PrimitiveType_Neg:
-      return new Neg(primitive);
+      return new (std::nothrow) Neg(primitive);
     case schema::PrimitiveType_RealDiv:
-      return new RealDiv(primitive);
+      return new (std::nothrow) RealDiv(primitive);
     case schema::PrimitiveType_LshProjection:
-      return new LshProjection(primitive);
+      return new (std::nothrow) LshProjection(primitive);
     case schema::PrimitiveType_HashtableLookup:
-      return new HashtableLookup(primitive);
+      return new (std::nothrow) HashtableLookup(primitive);
     case schema::PrimitiveType_SkipGram:
-      return new SkipGram(primitive);
+      return new (std::nothrow) SkipGram(primitive);
     case schema::PrimitiveType_Clip:
-      return new Clip(primitive);
+      return new (std::nothrow) Clip(primitive);
     case schema::PrimitiveType_CustomPredict:
-      return new CustomPredict(primitive);
+      return new (std::nothrow) CustomPredict(primitive);
     case schema::PrimitiveType_CustomNormalize:
-      return new CustomNormalize(primitive);
+      return new (std::nothrow) CustomNormalize(primitive);
     case schema::PrimitiveType_CustomExtractFeatures:
-      return new CustomExtractFeatures(primitive);
+      return new (std::nothrow) CustomExtractFeatures(primitive);
     case schema::PrimitiveType_Upsample:
-      return new Upsample(primitive);
+      return new (std::nothrow) Upsample(primitive);
     case schema::PrimitiveType_LayerNorm:
-      return new LayerNorm(primitive);
+      return new (std::nothrow) LayerNorm(primitive);
     case schema::PrimitiveType_NonMaxSuppression:
-      return new NonMaxSuppression(primitive);
+      return new (std::nothrow) NonMaxSuppression(primitive);
     case schema::PrimitiveType_Identity:
-      return new Identity(primitive);
+      return new (std::nothrow) Identity(primitive);
     case schema::PrimitiveType_Rfft:
-      return new Rfft(primitive);
+      return new (std::nothrow) Rfft(primitive);
     case schema::PrimitiveType_FftReal:
-      return new FftReal(primitive);
+      return new (std::nothrow) FftReal(primitive);
     case schema::PrimitiveType_FftImag:
-      return new FftImag(primitive);
+      return new (std::nothrow) FftImag(primitive);
     case schema::PrimitiveType_AudioSpectrogram:
-      return new AudioSpectrogram(primitive);
+      return new (std::nothrow) AudioSpectrogram(primitive);
     case schema::PrimitiveType_Mfcc:
-      return new Mfcc(primitive);
+      return new (std::nothrow) Mfcc(primitive);
     case schema::PrimitiveType_InstanceNorm:
-      return new InstanceNorm(primitive);
+      return new (std::nothrow) InstanceNorm(primitive);
     case schema::PrimitiveType_While:
-      return new While(primitive);
+      return new (std::nothrow) While(primitive);
     case schema::PrimitiveType_OnnxInt8Quantize:
-      return new Quant(primitive);
+      return new (std::nothrow) Quant(primitive);
     case schema::PrimitiveType_OnnxInt8Dequantize:
-      return new Dequant(primitive);
+      return new (std::nothrow) Dequant(primitive);
 
 #ifdef SUPPORT_TRAIN
     case schema::PrimitiveType_ActivationGrad:
-      return new ActivationGrad(primitive);
+      return new (std::nothrow) ActivationGrad(primitive);
     case schema::PrimitiveType_PoolingGrad:
-      return new PoolingGrad(primitive);
+      return new (std::nothrow) PoolingGrad(primitive);
     case schema::PrimitiveType_Conv2DGradFilter:
-      return new Conv2DGradFilter(primitive);
+      return new (std::nothrow) Conv2DGradFilter(primitive);
     case schema::PrimitiveType_Conv2DGradInput:
-      return new Conv2DGradInput(primitive);
+      return new (std::nothrow) Conv2DGradInput(primitive);
     case schema::PrimitiveType_GroupConv2DGradInput:
-      return new GroupConv2DGradInput(primitive);
+      return new (std::nothrow) GroupConv2DGradInput(primitive);
     case schema::PrimitiveType_BiasGrad:
-      return new BiasGrad(primitive);
+      return new (std::nothrow) BiasGrad(primitive);
     case schema::PrimitiveType_ApplyMomentum:
-      return new ApplyMomentum(primitive);
+      return new (std::nothrow) ApplyMomentum(primitive);
     case schema::PrimitiveType_BNGrad:
-      return new BNGrad(primitive);
+      return new (std::nothrow) BNGrad(primitive);
     case schema::PrimitiveType_AddGrad:
-      return new ArithmeticGrad(primitive);
+      return new (std::nothrow) ArithmeticGrad(primitive);
     case schema::PrimitiveType_SubGrad:
-      return new ArithmeticGrad(primitive);
+      return new (std::nothrow) ArithmeticGrad(primitive);
     case schema::PrimitiveType_MulGrad:
-      return new ArithmeticGrad(primitive);
+      return new (std::nothrow) ArithmeticGrad(primitive);
     case schema::PrimitiveType_DivGrad:
-      return new ArithmeticGrad(primitive);
+      return new (std::nothrow) ArithmeticGrad(primitive);
     case schema::PrimitiveType_SoftmaxCrossEntropy:
-      return new SoftmaxCrossEntropy(primitive);
+      return new (std::nothrow) SoftmaxCrossEntropy(primitive);
     case schema::PrimitiveType_PowerGrad:
-      return new PowerGrad(primitive);
+      return new (std::nothrow) PowerGrad(primitive);
     case schema::PrimitiveType_Depend:
-      return new Depend(primitive);
+      return new (std::nothrow) Depend(primitive);
     case schema::PrimitiveType_ControlDepend:
-      return new ControlDepend(primitive);
+      return new (std::nothrow) ControlDepend(primitive);
     case schema::PrimitiveType_FlattenGrad:
-      return new FlattenGrad(primitive);
+      return new (std::nothrow) FlattenGrad(primitive);
     case schema::PrimitiveType_NegGrad:
-      return new NegGrad(primitive);
+      return new (std::nothrow) NegGrad(primitive);
     case schema::PrimitiveType_LogGrad:
-      return new LogGrad(primitive);
+      return new (std::nothrow) LogGrad(primitive);
     case schema::PrimitiveType_Sgd:
-      return new Sgd(primitive);
+      return new (std::nothrow) Sgd(primitive);
     case schema::PrimitiveType_Adam:
-      return new Adam(primitive);
+      return new (std::nothrow) Adam(primitive);
     case schema::PrimitiveType_Assign:
-      return new Assign(primitive);
+      return new (std::nothrow) Assign(primitive);
     case schema::PrimitiveType_AssignAdd:
-      return new AssignAdd(primitive);
+      return new (std::nothrow) AssignAdd(primitive);
     case schema::PrimitiveType_OnesLike:
-      return new OnesLike(primitive);
+      return new (std::nothrow) OnesLike(primitive);
     case schema::PrimitiveType_UnsortedSegmentSum:
-      return new UnsortedSegmentSum(primitive);
+      return new (std::nothrow) UnsortedSegmentSum(primitive);
     case schema::PrimitiveType_BinaryCrossEntropyGrad:
-      return new BinaryCrossEntropyGrad(primitive);
+      return new (std::nothrow) BinaryCrossEntropyGrad(primitive);
     case schema::PrimitiveType_BinaryCrossEntropy:
-      return new BinaryCrossEntropy(primitive);
+      return new (std::nothrow) BinaryCrossEntropy(primitive);
     case schema::PrimitiveType_DropoutGrad:
-      return new DropoutGrad(primitive);
+      return new (std::nothrow) DropoutGrad(primitive);
     case schema::PrimitiveType_MaximumGrad:
-      return new MaximumGrad(primitive);
+      return new (std::nothrow) MaximumGrad(primitive);
     case schema::PrimitiveType_MinimumGrad:
-      return new MinimumGrad(primitive);
+      return new (std::nothrow) MinimumGrad(primitive);
 #endif
     default:
       MS_LOG(ERROR) << "Unsupported primitive type in Create : " << schema::EnumNamePrimitiveType(op_type);
diff --git a/mindspore/lite/src/ops/primitive_c.h b/mindspore/lite/src/ops/primitive_c.h
index 89e5f0c007..4494516c15 100644
--- a/mindspore/lite/src/ops/primitive_c.h
+++ b/mindspore/lite/src/ops/primitive_c.h
@@ -79,9 +79,9 @@ class PrimitiveC : public mindspore::Primitive {
 
   void ClearPrimitiveT();
 
-  bool operator==(const Value &rhs) const {
+  bool operator==(const Value &rhs) const override {
     if (rhs.isa<PrimitiveC>()) {
-      auto other_prim = static_cast<const PrimitiveC &>(rhs);
+      auto other_prim = dynamic_cast<const PrimitiveC &>(rhs);
       auto a = this->primitive_->value.type;
       auto b = other_prim.primitive_->value.type;
       return a == b;
@@ -104,11 +104,11 @@ class PrimitiveC : public mindspore::Primitive {
 
   void ClearInputOutputQuantParam();
 
-  void AddInputQuantParam(std::vector<schema::QuantParamT> quant_param);
+  void AddInputQuantParam(const std::vector<schema::QuantParamT> &quant_param);
 
   std::vector<std::vector<schema::QuantParamT>> input_quant_params() const;
 
-  void AddOutputQuantParam(std::vector<schema::QuantParamT> quant_param);
+  void AddOutputQuantParam(const std::vector<schema::QuantParamT> &quant_param);
 
   std::vector<std::vector<schema::QuantParamT>> output_quant_params() const;
 
@@ -126,7 +126,7 @@ class PrimitiveC : public mindspore::Primitive {
 
   static PrimitiveC *Create(mindspore::schema::PrimitiveT *primitive);
 
-  void GetAttrDataFromInput(const AnfNodePtr inputNode, std::vector<int> *data);
+  static void GetAttrDataFromInput(const AnfNodePtr &inputNode, std::vector<int> *data);
 
   static std::shared_ptr<PrimitiveC> Create(const Primitive &prim, const std::vector<AnfNodePtr> &inputs,
                                             const schema::QuantType &quantType);
@@ -135,7 +135,7 @@ class PrimitiveC : public mindspore::Primitive {
   void PopulaterInputQuantParam(const Primitive &prim, const std::vector<AnfNodePtr> &inputs,
                                 bool narrowRangeQuantParam, int32_t numbitsRangeQuantParam);
   void PopulaterOutputQuantParam(const Primitive &prim, bool narrowRangeQuantParam, int32_t numbitsRangeQuantParam);
-  void CalFloatScopeByMeanAndStddev(const double &mean, const double &stdDev, float *mMin, float *mMax);
+  static void CalFloatScopeByMeanAndStddev(const double &mean, const double &stdDev, float *mMin, float *mMax);
 
  protected:
   virtual int UnPackAttr(const Primitive &prim, const std::vector<AnfNodePtr> &inputs) { return RET_ERROR; }
diff --git a/mindspore/lite/src/ops/sub.cc b/mindspore/lite/src/ops/sub.cc
index 5fd57344a7..52d4d75418 100644
--- a/mindspore/lite/src/ops/sub.cc
+++ b/mindspore/lite/src/ops/sub.cc
@@ -52,7 +52,6 @@ int Sub::UnPackAttr(const Primitive &prim, const std::vector<AnfNodePtr> &inputs
       this->primitive_ = nullptr;
       return RET_ERROR;
     }
-    // todo: confirm the activationType
     attr->activationType = schema::ActivationType_NO_ACTIVATION;
     this->primitive_->value.value = attr;
   }
diff --git a/mindspore/lite/src/param_value_lite.h b/mindspore/lite/src/param_value_lite.h
index e3f95a93df..264ed636c5 100644
--- a/mindspore/lite/src/param_value_lite.h
+++ b/mindspore/lite/src/param_value_lite.h
@@ -37,15 +37,15 @@ class ParamValueLite : public Value {
   }
   MS_DECLARE_PARENT(ParamValueLite, Value)
   size_t tensor_size() const { return tensor_size_; }
-  void set_tensor_size(size_t size) { tensor_size_ = size; }
+  void set_tensor_size(const size_t size) { tensor_size_ = size; }
   void *tensor_addr() const { return tensor_addr_; }
   void set_tensor_addr(void *addr) { tensor_addr_ = addr; }
 
   std::vector<int> tensor_shape() const { return tensor_shape_; }
-  void set_tensor_shape(std::vector<int> tensor_shape) { tensor_shape_ = std::move(tensor_shape); }
+  void set_tensor_shape(const std::vector<int> &tensor_shape) { tensor_shape_ = tensor_shape; }
 
   TypeId tensor_type() const { return type_id_; }
-  void set_tensor_type(TypeId type_id) { type_id_ = type_id; }
+  void set_tensor_type(const TypeId type_id) { type_id_ = type_id; }
 
   int tensor_shape_size() const {
     int size = 1;
diff --git a/mindspore/lite/src/runtime/allocator.cc b/mindspore/lite/src/runtime/allocator.cc
index f1ff0aa761..867e408370 100644
--- a/mindspore/lite/src/runtime/allocator.cc
+++ b/mindspore/lite/src/runtime/allocator.cc
@@ -23,7 +23,7 @@ std::shared_ptr<Allocator> Allocator::Create() {
   return std::shared_ptr<Allocator>(new (std::nothrow) DefaultAllocator());
 }
 
-DefaultAllocator::DefaultAllocator() {}
+DefaultAllocator::DefaultAllocator() = default;
 
 DefaultAllocator::~DefaultAllocator() { Clear(); }
 
@@ -94,13 +94,13 @@ size_t DefaultAllocator::GetTotalSize() {
   Lock();
   size_t totalSize = 0;
 
-  for (auto it = allocatedList_.begin(); it != allocatedList_.end(); it++) {
-    auto membuf = it->second;
+  for (auto &it : allocatedList_) {
+    auto membuf = it.second;
     totalSize += membuf->size;
   }
 
-  for (auto it = freeList_.begin(); it != freeList_.end(); it++) {
-    auto membuf = it->second;
+  for (auto &it : freeList_) {
+    auto membuf = it.second;
     totalSize += membuf->size;
   }
   UnLock();
@@ -110,13 +110,13 @@ size_t DefaultAllocator::GetTotalSize() {
 void DefaultAllocator::Clear() {
   Lock();
 
-  for (auto it = allocatedList_.begin(); it != allocatedList_.end(); it++) {
-    free(it->second);
+  for (auto &it : allocatedList_) {
+    free(it.second);
   }
   allocatedList_.clear();
 
-  for (auto it = freeList_.begin(); it != freeList_.end(); it++) {
-    free(it->second);
+  for (auto &it : freeList_) {
+    free(it.second);
   }
   freeList_.clear();
   UnLock();
diff --git a/mindspore/lite/src/runtime/allocator.h b/mindspore/lite/src/runtime/allocator.h
index 94c3ef6709..da52943ad6 100644
--- a/mindspore/lite/src/runtime/allocator.h
+++ b/mindspore/lite/src/runtime/allocator.h
@@ -34,7 +34,7 @@ struct AllocatorContext {
 class Allocator {
  public:
   Allocator() : name("default") {}
-  virtual ~Allocator() {}
+  virtual ~Allocator() = default;
   virtual void *Malloc(size_t size) = 0;
   virtual void Free(void *ptr) = 0;
   virtual void SetContext(const AllocatorContext &ctx) {}
diff --git a/mindspore/lite/src/runtime/parallel_executor.cc b/mindspore/lite/src/runtime/parallel_executor.cc
index c479907823..7f1c80aa9a 100644
--- a/mindspore/lite/src/runtime/parallel_executor.cc
+++ b/mindspore/lite/src/runtime/parallel_executor.cc
@@ -31,7 +31,7 @@ int ParallelExecutor::Prepare(const std::vector<mindspore::kernel::LiteKernel *>
 }
 
 static int RunKernel(void *data, int index) {
-  ParallelExecutor *executor = reinterpret_cast<ParallelExecutor *>(data);
+  auto *executor = reinterpret_cast<ParallelExecutor *>(data);
   auto kernel = executor->GetReadyKernel(index);
   auto ret = kernel->Run();
   executor->SetResult(index, ret);
@@ -65,16 +65,19 @@ int ParallelExecutor::Run(std::vector<Tensor *> &in_tensors, std::vector<Tensor
   kernel::LiteKernelUtil::InitTensorRefCount(kernels);
 
   for (auto kernel : kernels) {
-    if (kernel->in_kernels().size() == 0) {
+    if (kernel->in_kernels().empty()) {
       readyKernels.emplace_back(kernel);
       continue;
     }
     refCount[kernel] = kernel->in_kernels().size();
   }
   std::vector<kernel::LiteKernel *> newReadyKernels;
-  while (readyKernels.size() > 0) {
+  while (!readyKernels.empty()) {
     results.resize(readyKernels.size(), RET_OK);
-    ParallelLaunch(thread_pool_, RunKernel, this, readyKernels.size());
+    if (0 != ParallelLaunch(thread_pool_, RunKernel, this, readyKernels.size())) {
+      MS_LOG(ERROR) << "ParallelLaunch failed ";
+      return RET_ERROR;
+    }
 
     if (std::find_if(results.begin(), results.end(), [](const int &ret) { return (ret != 0); }) != results.end()) {
       return RET_ERROR;
diff --git a/mindspore/lite/src/runtime/parallel_executor.h b/mindspore/lite/src/runtime/parallel_executor.h
index 38bf87c910..916a95fd4d 100644
--- a/mindspore/lite/src/runtime/parallel_executor.h
+++ b/mindspore/lite/src/runtime/parallel_executor.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_PARALLEL_EXECUTOR_H_
-#define MINDSPORE_LITE_PARALLEL_EXECUTOR_H_
+#ifndef MINDSPORE_LITE_SRC_RUNTIME_PARALLEL_EXECUTOR_H_
+#define MINDSPORE_LITE_SRC_RUNTIME_PARALLEL_EXECUTOR_H_
 
 #include <vector>
 #include <unordered_map>
@@ -28,7 +28,7 @@ namespace mindspore::lite {
 class ParallelExecutor : public Executor {
  public:
   ParallelExecutor() = default;
-  virtual ~ParallelExecutor();
+  ~ParallelExecutor() override;
 
   int Prepare(const std::vector<kernel::LiteKernel *> &kernels) override;
 
@@ -42,8 +42,8 @@ class ParallelExecutor : public Executor {
   std::unordered_map<kernel::LiteKernel *, size_t> refCount;
   std::vector<kernel::LiteKernel *> readyKernels;
   std::vector<int> results;
-  struct ThreadPool *thread_pool_ = NULL;
+  struct ThreadPool *thread_pool_ = nullptr;
 };
 
 }  // namespace mindspore::lite
-#endif
+#endif  // MINDSPORE_LITE_SRC_RUNTIME_PARALLEL_EXECUTOR_H_
diff --git a/mindspore/lite/src/runtime/runtime_api.cc b/mindspore/lite/src/runtime/runtime_api.cc
index 3045e64c62..93b1a477ac 100644
--- a/mindspore/lite/src/runtime/runtime_api.cc
+++ b/mindspore/lite/src/runtime/runtime_api.cc
@@ -16,7 +16,6 @@
 
 #include "src/runtime/runtime_api.h"
 #include <mutex>
-#include <string>
 #include "src/common/log_adapter.h"
 
 static std::mutex gWorkspaceMutex;
diff --git a/mindspore/lite/src/runtime/runtime_api.h b/mindspore/lite/src/runtime/runtime_api.h
index 29083aa5c1..b9f503a67d 100644
--- a/mindspore/lite/src/runtime/runtime_api.h
+++ b/mindspore/lite/src/runtime/runtime_api.h
@@ -13,8 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#ifndef PREDICT_SRC_RUNTIME_RUNTIME_API_H_
-#define PREDICT_SRC_RUNTIME_RUNTIME_API_H_
+#ifndef MINDSPORE_LITE_SRC_RUNTIME_RUNTIME_API_H_
+#define MINDSPORE_LITE_SRC_RUNTIME_RUNTIME_API_H_
 #include <memory>
 
 #ifndef INTERNAL_API_DLL
@@ -40,4 +40,4 @@ INTERNAL_API_DLL int LiteBackendRegisterSystemLibSymbol(const char *name, void *
 #ifdef __cplusplus
 }
 #endif
-#endif  // PREDICT_SRC_RUNTIME_RUNTIME_API_H_
+#endif  // MINDSPORE_LITE_SRC_RUNTIME_RUNTIME_API_H_
diff --git a/mindspore/lite/src/scheduler.cc b/mindspore/lite/src/scheduler.cc
index 2f1a3f0295..bc62e96ed0 100644
--- a/mindspore/lite/src/scheduler.cc
+++ b/mindspore/lite/src/scheduler.cc
@@ -72,10 +72,6 @@ int Scheduler::ReSizeKernels(const std::vector<kernel::LiteKernel *> &kernels) {
       return RET_ERROR;
     }
     auto sub_graph = reinterpret_cast<kernel::SubGraphKernel *>(kernel);
-    if (sub_graph == nullptr) {
-      MS_LOG(ERROR) << "node " << kernel->name() << " is neither a kernel or a sub_graph";
-      return RET_ERROR;
-    }
     auto ret = sub_graph->ReSize(infer_shape_interrupt);
     if (ret == RET_INFER_INVALID) {
       MS_LOG(INFO) << "InferShape is interrupted";
@@ -133,7 +129,7 @@ int Scheduler::InferShape(const lite::Model *model, std::vector<Tensor *> *tenso
   return RET_OK;
 }
 
-int Scheduler::BuildKernels(const lite::Model *model, std::vector<Tensor *> *tensors,
+int Scheduler::BuildKernels(const lite::Model *model, const std::vector<Tensor *> *tensors,
                             std::vector<kernel::LiteKernel *> *kernels) {
   MS_ASSERT(model != nullptr);
   MS_ASSERT(tensors != nullptr);
@@ -244,21 +240,21 @@ kernel::SubGraphKernel *Scheduler::CreateSubGraphKernel(const std::vector<kernel
   std::vector<kernel::LiteKernel *> output_kernels = kernel::LiteKernelUtil::SubgraphOutputKernels(kernels);
   if (type == kernel::kGpuSubGraph) {
 #if SUPPORT_GPU
-    auto sub_kernel =
-      new kernel::SubGraphOpenCLKernel(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
+    auto sub_kernel = new (std::nothrow)
+      kernel::SubGraphOpenCLKernel(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
     return sub_kernel;
 #else
     return nullptr;
 #endif
   }
   if (type == kernel::kCpuFP16SubGraph) {
-    auto sub_kernel =
-      new kernel::CpuFp16SubGraph(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
+    auto sub_kernel = new (std::nothrow)
+      kernel::CpuFp16SubGraph(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
     return sub_kernel;
   }
   if (type == kernel::kCpuFP32SubGraph) {
-    auto sub_kernel =
-      new kernel::CpuFp32SubGraph(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
+    auto sub_kernel = new (std::nothrow)
+      kernel::CpuFp32SubGraph(input_tensors, output_tensors, input_kernels, output_kernels, kernels, context_);
     return sub_kernel;
   }
   return nullptr;
@@ -344,7 +340,7 @@ void Scheduler::SetKernelTensorDataType(kernel::LiteKernel *kernel) {
   }
 }
 
-kernel::SubGraphType Scheduler::GetKernelSubGraphType(kernel::LiteKernel *kernel) {
+kernel::SubGraphType Scheduler::GetKernelSubGraphType(const kernel::LiteKernel *kernel) {
   if (kernel == nullptr) {
     return kernel::kNotSubGraph;
   }
diff --git a/mindspore/lite/src/scheduler.h b/mindspore/lite/src/scheduler.h
index f66aca1681..15275ac8e9 100644
--- a/mindspore/lite/src/scheduler.h
+++ b/mindspore/lite/src/scheduler.h
@@ -38,7 +38,7 @@ class Scheduler {
   kernel::LiteKernel *ScheduleNode(const std::vector<Tensor *> &in_tensors, const std::vector<Tensor *> &out_tensors,
                                    const mindspore::lite::PrimitiveC *primitive, const Model::Node *cnode);
 
-  int BuildKernels(const lite::Model *model, std::vector<Tensor *> *tensors,
+  int BuildKernels(const lite::Model *model, const std::vector<Tensor *> *tensors,
                    std::vector<kernel::LiteKernel *> *kernels);
 
   static int InferShape(const lite::Model *model, std::vector<Tensor *> *tensors);
@@ -55,7 +55,7 @@ class Scheduler {
 
   static void SetKernelTensorDataType(kernel::LiteKernel *kernel);
 
-  static kernel::SubGraphType GetKernelSubGraphType(kernel::LiteKernel *kernel);
+  static kernel::SubGraphType GetKernelSubGraphType(const kernel::LiteKernel *kernel);
 
  protected:
   InnerContext *context_ = nullptr;
diff --git a/mindspore/lite/src/sub_graph_kernel.cc b/mindspore/lite/src/sub_graph_kernel.cc
index 7642ab643d..2ba75b73ca 100644
--- a/mindspore/lite/src/sub_graph_kernel.cc
+++ b/mindspore/lite/src/sub_graph_kernel.cc
@@ -115,7 +115,11 @@ int SubGraphKernel::ReSize(bool is_interrupt) {
     std::vector<lite::Tensor *> inputs = kernel->in_tensors();
     std::vector<lite::Tensor *> outputs = kernel->out_tensors();
     for (auto &output : outputs) {
-      output->FreeData();
+      auto ret = output->FreeData();
+      if (ret != RET_OK) {
+        MS_LOG(ERROR) << "FreeData failed";
+        return RET_ERROR;
+      }
     }
     primitive->set_infer_flag(!is_interrupt);
     auto ret = primitive->InferShape(inputs, outputs);
diff --git a/mindspore/lite/src/sub_graph_kernel.h b/mindspore/lite/src/sub_graph_kernel.h
index b537f18e0c..29ca117977 100644
--- a/mindspore/lite/src/sub_graph_kernel.h
+++ b/mindspore/lite/src/sub_graph_kernel.h
@@ -104,7 +104,7 @@ class CpuSubGraph : public SubGraphKernel {
                        const std::vector<LiteKernel *> &nodes, const lite::InnerContext *ctx)
       : SubGraphKernel(inputs, outputs, in_kernels, out_kernels, nodes, ctx) {
     subgraph_type_ = kCpuFP32SubGraph;
-    this->executor_ = new mindspore::lite::Executor;
+    this->executor_ = new (std::nothrow) mindspore::lite::Executor;
   }
 
   ~CpuSubGraph() override { delete this->executor_; }
diff --git a/mindspore/lite/src/tensor.cc b/mindspore/lite/src/tensor.cc
index ea74adcd27..6b8b215050 100644
--- a/mindspore/lite/src/tensor.cc
+++ b/mindspore/lite/src/tensor.cc
@@ -18,6 +18,7 @@
 #include <string>
 #include <utility>
 #include <algorithm>
+#include <functional>
 #include "src/tensor.h"
 #include "securec/include/securec.h"
 #include "include/errorcode.h"
@@ -25,8 +26,8 @@
 namespace mindspore {
 namespace lite {
 #define kMaxMallocSize 1024 * 1024 * 100
-Tensor::Tensor(const TypeId data_type, const std::vector<int> &shape, const schema::Format &format, Category category)
-    : data_type_(data_type), shape_(shape), format_(format), category_(category) {}
+Tensor::Tensor(const TypeId data_type, std::vector<int> shape, const schema::Format &format, Category category)
+    : data_type_(data_type), shape_(std::move(shape)), format_(format), category_(category) {}
 
 Tensor::Tensor(const Tensor &tensor) {
   auto ret = CopyTensor(tensor, true);
@@ -234,7 +235,7 @@ int32_t Tensor::ElementsC4Num() const {
   return result;
 }
 
-int Tensor::DimensionSize(size_t index) const {
+int Tensor::DimensionSize(const size_t index) const {
   int dim_size = -1;
   if (index < shape_.size()) {
     dim_size = shape_[index];
@@ -277,12 +278,12 @@ std::string Tensor::ToString() const {
   return oss.str();
 }
 
-int Tensor::MallocData(mindspore::lite::Allocator *allocator) {
+int Tensor::MallocData(const mindspore::lite::Allocator *allocator) {
   if (nullptr != this->data_) {
     return RET_OK;
   }
   if (allocator != nullptr) {
-    allocator_ = allocator;
+    allocator_ = const_cast<mindspore::lite::Allocator *>(allocator);
   }
   if (allocator_ == nullptr) {
     this->data_ = malloc(this->Size());
diff --git a/mindspore/lite/src/tensor.h b/mindspore/lite/src/tensor.h
index 2835695ad0..b0cdd42f29 100644
--- a/mindspore/lite/src/tensor.h
+++ b/mindspore/lite/src/tensor.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_SRC_IR_TENSOR_H_
-#define MINDSPORE_LITE_SRC_IR_TENSOR_H_
+#ifndef MINDSPORE_LITE_SRC_TENSOR_H_
+#define MINDSPORE_LITE_SRC_TENSOR_H_
 
 #include <memory>
 #include <vector>
@@ -49,18 +49,18 @@ class Tensor : public mindspore::tensor::MSTensor {
   };
   Tensor() = default;
 
-  Tensor(const TypeId data_type, const std::vector<int> &shape,
-         const schema::Format &format = schema::Format::Format_NHWC, Category category = VAR);
+  Tensor(TypeId data_type, std::vector<int> shape, const schema::Format &format = schema::Format::Format_NHWC,
+         Category category = VAR);
 
   Tensor(const Tensor &tensor);
 
-  virtual ~Tensor();
+  ~Tensor() override;
 
   int CopyTensorData(const Tensor &srcTensor);
 
   int CopyTensor(const Tensor &srcTensor, bool copyData = false);
 
-  virtual Tensor &operator=(const Tensor &tensor);
+  Tensor &operator=(const Tensor &tensor);
 
   virtual bool operator==(const Tensor &tensor);
 
@@ -92,7 +92,7 @@ class Tensor : public mindspore::tensor::MSTensor {
 
   mindspore::lite::Allocator *allocator() const { return this->allocator_; }
 
-  int MallocData(mindspore::lite::Allocator *allocator = nullptr);
+  int MallocData(const mindspore::lite::Allocator *allocator = nullptr);
 
   int FreeData();
 
@@ -108,7 +108,7 @@ class Tensor : public mindspore::tensor::MSTensor {
 
   schema::Format format() { return this->format_; }
 
-  size_t ref_count() { return this->ref_count_; }
+  size_t ref_count() const { return this->ref_count_; }
 
   void set_ref_count(size_t ref_count) { this->ref_count_ = ref_count; }
 
@@ -218,4 +218,4 @@ std::vector<tensor::MSTensor *> TensorVectorCast(const std::vector<Tensor *> &sr
 }  // namespace mindspore
 
 using TensorPtr = std::shared_ptr<mindspore::lite::Tensor>;
-#endif  // MINDSPORE_LITE_SRC_IR_TENSOR_H_
+#endif  // MINDSPORE_LITE_SRC_TENSOR_H_