diff --git a/mindspore/lite/src/executor.cc b/mindspore/lite/src/executor.cc
index b95ddd82a85addab43aa3f1302d7085da0dad77f..5b53c1269b27f0a37dbe33b456678e41beba3ca5 100644
--- a/mindspore/lite/src/executor.cc
+++ b/mindspore/lite/src/executor.cc
@@ -39,7 +39,7 @@ int Executor::Run(std::vector<tensor::Tensor *> &inputs, std::vector<tensor::Ten
     auto &outputs = kernel->GetOutputs();
     for (auto *output : outputs) {
       MS_ASSERT(nullptr != output);
-      output->MallocData(allocator);
+      output->MallocData();
     }
     kernel::CallBackParam callbackParam;
     callbackParam.name_callback_aram = kernel->Name();
@@ -62,7 +62,7 @@ int Executor::Run(std::vector<tensor::Tensor *> &inputs, std::vector<tensor::Ten
     }
     for (auto input_kernel : kernel->GetInKernels()) {
       MS_EXCEPTION_IF_NULL(input_kernel);
-      ret = input_kernel->DecOutTensorRefCount(allocator);
+      ret = input_kernel->DecOutTensorRefCount();
       if (0 != ret) {
         MS_LOG(WARNING) << "DecOutTensorRefCount for kernel" << kernel->Name() << " failed";
       }
diff --git a/mindspore/lite/src/ir/tensor.h b/mindspore/lite/src/ir/tensor.h
index 8a84da3d4fd5bae6d1e2162f319c4ddbf0643182..3351af238c1d0befa527757f636f908d654311a7 100644
--- a/mindspore/lite/src/ir/tensor.h
+++ b/mindspore/lite/src/ir/tensor.h
@@ -112,19 +112,24 @@ class Tensor : public mindspore::tensor::MetaTensor {
         return 0;
     }
     size *= (format_ == schema::Format_NC4HW4 || format_ == schema::Format_NHWC4) ? ElementsC4Num()
-                                                                                         : MetaTensor::ElementsNum();
+                                                                                  : MetaTensor::ElementsNum();
 
     return size;
   }
 
+  void set_allocator(mindspore::lite::Allocator *allocator) { allocator_ = allocator; }
+
   int MallocData(mindspore::lite::Allocator *allocator = nullptr) {
     if (nullptr != this->data_) {
       return 0;
     }
-    if (nullptr == allocator) {
+    if (allocator != nullptr) {
+      allocator_ = allocator;
+    }
+    if (allocator_ == nullptr) {
       this->data_ = malloc(this->Size());
     } else {
-      this->data_ = allocator->Malloc(this->Size());
+      this->data_ = allocator_->Malloc(this->Size());
     }
     if (nullptr == this->data_) {
       MS_LOG(ERROR) << "Malloc tensor data failed, size=" << this->Size();
@@ -134,14 +139,14 @@ class Tensor : public mindspore::tensor::MetaTensor {
     return 0;
   }
 
-  int FreeData(mindspore::lite::Allocator *allocator = nullptr) {
+  int FreeData() {
     if (nullptr == this->data_) {
       return 0;
     }
-    if (nullptr == allocator) {
+    if (nullptr == allocator_) {
       free(this->data_);
     } else {
-      allocator->Free(this->data_);
+      allocator_->Free(this->data_);
       this->data_ = nullptr;
     }
 
@@ -177,6 +182,7 @@ class Tensor : public mindspore::tensor::MetaTensor {
   schema::Format format_;
   size_t refCount = 0;
   std::vector<tensor::QuantArg> quant_params_;
+  mindspore::lite::Allocator *allocator_ = nullptr;
 };
 
 class LiteTensor : public mindspore::tensor::MSTensor {
@@ -221,4 +227,3 @@ using TensorPtr = std::shared_ptr<tensor::Tensor>;
 }  // namespace mindspore
 
 #endif  // MINDSPORE_LITE_SRC_IR_TENSOR_H_
-
diff --git a/mindspore/lite/src/lite_kernel.cc b/mindspore/lite/src/lite_kernel.cc
index 43d2b9d38835cfc0d509ac6f2c60727cbd9598fa..86e172a3155ab32be5a2d352a9f0f4a36b5ceeaf 100644
--- a/mindspore/lite/src/lite_kernel.cc
+++ b/mindspore/lite/src/lite_kernel.cc
@@ -25,11 +25,11 @@ void LiteKernel::InitOutTensorRefCount() {
   }
 }
 
-int LiteKernel::DecOutTensorRefCount(lite::Allocator *allocator) {
+int LiteKernel::DecOutTensorRefCount() {
   for (auto *tensor : this->outputs_) {
     tensor->decRefCount();
     if (0 >= tensor->RefCount()) {
-      auto ret = tensor->FreeData(allocator);
+      auto ret = tensor->FreeData();
       if (0 != ret) {
         MS_LOG(ERROR) << "Free tensor data failed";
         return ret;
@@ -141,4 +141,3 @@ void LiteKernelUtil::InitTensorRefCount(std::vector<kernel::LiteKernel *> &kerne
 
 int LiteKernelUtil::SetInput(LiteKernel &kernelMod, std::vector<lite::tensor::Tensor *> inputs) { return -1; }
 }  // namespace mindspore::kernel
-
diff --git a/mindspore/lite/src/lite_kernel.h b/mindspore/lite/src/lite_kernel.h
index 30dbe88a0381b5da31b6f723d02f5f913703d698..7cd2cfa9f222718e323e083532742437fa91f13d 100644
--- a/mindspore/lite/src/lite_kernel.h
+++ b/mindspore/lite/src/lite_kernel.h
@@ -22,7 +22,6 @@
 #include <arm_neon.h>
 #endif
 #include "src/runtime/kernel/arm/opclib/op_base.h"
-// #include "backend/kernel_compiler/kernel.h"
 #include "include/context.h"
 #include "src/ir/tensor.h"
 #include "src/ops/ops.h"
@@ -60,7 +59,6 @@ struct CallBackParam {
 using KernelCallBack = std::function<bool(std::vector<lite::tensor::Tensor *> inputs,
                                           std::vector<lite::tensor::Tensor *> outputs, const CallBackParam &opInfo)>;
 
-// class LiteKernel : public KernelMod {
 class LiteKernel {
  public:
   LiteKernel() = default;
@@ -73,17 +71,6 @@ class LiteKernel {
 
   virtual ~LiteKernel() { delete opParameter; }
 
-  //  bool Launch(const std::vector<AddressPtr> &inputs, const std::vector<AddressPtr> &workspace,
-  //              const std::vector<AddressPtr> &outputs, void *stream_ptr) override {
-  //    return false;
-  //  };
-  //
-  //  const std::vector<size_t> &GetInputSizeList() const override { return {}; }
-  //
-  //  const std::vector<size_t> &GetOutputSizeList() const override { return {}; }
-  //
-  //  const std::vector<size_t> &GetWorkspaceSizeList() const override { return {}; }
-
   virtual int Prepare() { return -1; }
   virtual int Init() { return -1; }
   virtual int ReSize() { return -1; }
@@ -115,7 +102,7 @@ class LiteKernel {
 
   void InitOutTensorRefCount();
 
-  int DecOutTensorRefCount(lite::Allocator *allocator = nullptr);
+  int DecOutTensorRefCount();
 
   const KernelKey Desc() const { return desc; }
 
diff --git a/mindspore/lite/src/lite_session.cc b/mindspore/lite/src/lite_session.cc
index c5db4580dfe2640dd0a6d1806046d08a7dd618ab..599aa9f56d779090dc7000e1f9119e9fe5c6d592 100644
--- a/mindspore/lite/src/lite_session.cc
+++ b/mindspore/lite/src/lite_session.cc
@@ -134,7 +134,7 @@ int LiteSession::CompileGraph(Model *model) {
   }
 
   auto ret = ConvertTensors(model);
-  if (0 != ret) {
+  if (ret != RET_OK) {
     MS_LOG(ERROR) << "ConvertTensors failed: " << ret;
     return ret;
   }
@@ -142,9 +142,9 @@ int LiteSession::CompileGraph(Model *model) {
   InitGraphInOutTensor(model);
 
   // scheduler kernels
-  Scheduler scheduler(context);
+  Scheduler scheduler(context_);
   ret = scheduler.Schedule(model, &tensors, &kernels);
-  if (0 != ret) {
+  if (ret != RET_OK) {
     MS_LOG(ERROR) << "Schedule kernels failed: " << ret;
     return ret;
   }
@@ -166,15 +166,15 @@ std::vector<mindspore::tensor::MSTensor *> LiteSession::GetInputs() {
 }
 
 int LiteSession::RunGraph() {
-  MS_EXCEPTION_IF_NULL(this->context);
+  MS_EXCEPTION_IF_NULL(this->context_);
   Executor executor;
-  return executor.Run(this->inputs, this->outputs, this->kernels, this->context->allocator.get());
+  return executor.Run(this->inputs, this->outputs, this->kernels, this->context_->allocator.get());
 }
 
 int LiteSession::RunGraph(const kernel::KernelCallBack &before, const kernel::KernelCallBack &after) {
-  MS_EXCEPTION_IF_NULL(this->context);
+  MS_EXCEPTION_IF_NULL(this->context_);
   Executor executor;
-  return executor.Run(this->inputs, this->outputs, this->kernels, this->context->allocator.get(), before, after);
+  return executor.Run(this->inputs, this->outputs, this->kernels, this->context_->allocator.get(), before, after);
 }
 
 std::vector<mindspore::tensor::MSTensor *> LiteSession::GetOutputs() {
@@ -190,30 +190,32 @@ std::vector<mindspore::tensor::MSTensor *> LiteSession::GetOutputs() {
   return ret;
 }
 
-void LiteSession::Init(Context *context) {
+int LiteSession::Init(Context *context) {
   MS_EXCEPTION_IF_NULL(context);
-  this->context = new Context;
-  this->context->cpuBindMode = context->cpuBindMode;
-  this->context->threadNum = context->threadNum;
-  this->context->deviceCtx.type = context->deviceCtx.type;
-  this->context->allocator = std::make_shared<DefaultAllocator>();
+  this->context_ = new (std::nothrow) Context(context->threadNum, context->allocator, context->deviceCtx);
+  if (this->context_ == nullptr) {
+    MS_LOG(ERROR) << "new context failed";
+    return RET_MEMORY_FAILED;
+  }
+  this->context_->cpuBindMode = context->cpuBindMode;
   ConfigThreadPool(context->cpuBindMode, context->threadNum);
   auto ret = KernelRegistry::GetInstance()->Init();
   if (ret != RET_OK) {
     MS_LOG(ERROR) << "KernelRegistry Init Failed.";
-    return;
+    return ret;
   }
 #if SUPPORT_GPU
-  if (context->deviceCtx.type == DT_GPU) {
+  if (context_->deviceCtx.type == DT_GPU) {
     auto opencl_runtime = lite::opencl::OpenCLRuntime::GetInstance();
     opencl_runtime->Init();
   }
 #endif
+  return RET_OK;
 }
 
 void LiteSession::BindThread(bool ifBind) {
-  if (this->context->cpuBindMode != NO_BIND) {
-    DoAllThreadBind(ifBind, static_cast<int>(this->context->cpuBindMode));
+  if (this->context_->cpuBindMode != NO_BIND) {
+    DoAllThreadBind(ifBind, static_cast<int>(this->context_->cpuBindMode));
   }
 }
 
@@ -234,17 +236,18 @@ LiteSession::~LiteSession() {
   }
 }
 
-std::vector<mindspore::tensor::MSTensor *> LiteSession::GetInputsByName(std::string name) {
-  return input_map[name];
-}
-std::vector<mindspore::tensor::MSTensor *> LiteSession::GetOutputsByName(std::string name) {
-  return output_map[name];
-}
+std::vector<mindspore::tensor::MSTensor *> LiteSession::GetInputsByName(std::string name) { return input_map[name]; }
+std::vector<mindspore::tensor::MSTensor *> LiteSession::GetOutputsByName(std::string name) { return output_map[name]; }
 }  // namespace lite
 
 session::LiteSession *session::LiteSession::CreateSession(lite::Context *context) {
   auto session = new lite::LiteSession();
-  session->Init(context);
+  auto ret = session->Init(context);
+  if (ret != mindspore::lite::RET_OK) {
+      MS_LOG(ERROR) << "init sesssion failed";
+      delete session;
+      return nullptr;
+  }
   return session;
 }
 }  // namespace mindspore
diff --git a/mindspore/lite/src/lite_session.h b/mindspore/lite/src/lite_session.h
index 88ea1b9232d239ececf806de6ee11c74d1506c08..b7b52625f7998711e53d9d094d354d4f8ff8f696 100644
--- a/mindspore/lite/src/lite_session.h
+++ b/mindspore/lite/src/lite_session.h
@@ -36,7 +36,7 @@ class LiteSession : public session::LiteSession {
 
   ~LiteSession() override;
 
-  void Init(Context *context);
+  int Init(Context *context);
 
   void BindThread(bool ifBind) override;
 
@@ -60,7 +60,7 @@ class LiteSession : public session::LiteSession {
   void InitGraphInOutTensor(const lite::Model *model);
 
  protected:
-  Context *context = nullptr;
+  Context *context_ = nullptr;
   std::vector<kernel::LiteKernel *> kernels;
   std::vector<tensor::Tensor *> tensors;
   // graph input tensors
diff --git a/mindspore/lite/src/runtime/kernel/opencl/subgraph_opencl_kernel.cc b/mindspore/lite/src/runtime/kernel/opencl/subgraph_opencl_kernel.cc
index dc055112788420fd158bfb450b078c46a53fa3db..f82c96b1454b8f340310588debe2cc5d1e1e3054 100644
--- a/mindspore/lite/src/runtime/kernel/opencl/subgraph_opencl_kernel.cc
+++ b/mindspore/lite/src/runtime/kernel/opencl/subgraph_opencl_kernel.cc
@@ -25,10 +25,10 @@ SubGraphOpenCLKernel::~SubGraphOpenCLKernel() { UnInit(); }
 int SubGraphOpenCLKernel::Init() {
   allocator_ = lite::opencl::OpenCLRuntime::GetInstance()->GetAllocator();
   for (const auto tensor : inputs_) {
-    tensor->MallocData(allocator_);
+    tensor->set_allocator(allocator_);
   }
   for (const auto tensor : outputs_) {
-    tensor->MallocData(allocator_);
+    tensor->set_allocator(allocator_);
   }
   // Map buffer for write, it is not necessary for fine-grained
   for (auto &tensor : inputs_) {
@@ -82,4 +82,3 @@ int SubGraphOpenCLKernel::Run() {
 }
 
 }  // namespace mindspore::kernel
-
diff --git a/mindspore/lite/src/scheduler.cc b/mindspore/lite/src/scheduler.cc
index 05e99b8fcbfa86599bcafb70257b160c2a70a0ad..e4a99de59de0954f200969d1ad7252526dbb612a 100644
--- a/mindspore/lite/src/scheduler.cc
+++ b/mindspore/lite/src/scheduler.cc
@@ -112,6 +112,11 @@ void Scheduler::ConstructSubgraphs(std::vector<kernel::LiteKernel *> *kernels) {
   for (auto temp_kernels : sub_kernels_list) {
     kernel::KERNEL_ARCH arch = temp_kernels.front()->Desc().arch;
     if (arch == kernel::KERNEL_ARCH::kCPU) {
+      for (auto kernel : temp_kernels) {
+        for (auto tensor : kernel->GetOutputs()) {
+          tensor->set_allocator(context_->allocator.get());
+        }
+      }
       std::copy(temp_kernels.begin(), temp_kernels.end(), std::back_inserter(subgraph_kernels));
     } else {
       auto subgraph_kernel = CreateSubKernel(temp_kernels, arch);
@@ -154,9 +159,9 @@ kernel::LiteKernel *Scheduler::ScheduleNode(const std::vector<tensor::Tensor *>
   MS_ASSERT(nullptr != primitive);
   auto data_type = inputs.front()->data_type();
   kernel::KernelKey desc{kernel::KERNEL_ARCH::kCPU, data_type, primitive->Type()};
-  if (context->deviceCtx.type == DT_GPU) {
+  if (context_->deviceCtx.type == DT_GPU) {
     desc.arch = kernel::KERNEL_ARCH::kGPU;
-    auto *kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context, desc);
+    auto *kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context_, desc);
     if (nullptr != kernel) {
       kernel->set_desc(desc);
       return kernel;
@@ -168,14 +173,14 @@ kernel::LiteKernel *Scheduler::ScheduleNode(const std::vector<tensor::Tensor *>
   if (data_type == kNumberTypeFloat32) {
     // check if support fp16
     kernel::KernelKey key{desc.arch, kNumberTypeFloat16, desc.type};
-    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context, key);
+    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context_, key);
     if (kernel != nullptr) {
       kernel->set_desc(desc);
       return kernel;
     }
-    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context, desc);
+    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context_, desc);
   } else {
-    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context, desc);
+    kernel = KernelFactory::GetInstance()->GetKernel(inputs, outputs, primitive, context_, desc);
   }
   if (kernel != nullptr) {
     kernel->set_desc(desc);
diff --git a/mindspore/lite/src/scheduler.h b/mindspore/lite/src/scheduler.h
index 6d0d98e1dfae5172fba101112561b9d07ad340b3..f86ca2b035599bdfa0dc29c1f51eb9880fbcf9c5 100644
--- a/mindspore/lite/src/scheduler.h
+++ b/mindspore/lite/src/scheduler.h
@@ -25,7 +25,7 @@
 namespace mindspore::lite {
 class Scheduler {
  public:
-  explicit Scheduler(const Context *ctx) : context(ctx) {}
+  explicit Scheduler(const Context *ctx) : context_(ctx) {}
   int Schedule(const lite::Model *model, std::vector<tensor::Tensor *> *tensors,
                std::vector<kernel::LiteKernel *> *kernels);
 
@@ -48,7 +48,7 @@ class Scheduler {
 
  protected:
   std::vector<std::vector<size_t>> markedKernelGroup;
-  const Context *context = nullptr;
+  const Context *context_ = nullptr;
 };
 }  // namespace mindspore::lite