diff --git a/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.cc b/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.cc
index 5a0dc32a710..71aa3515d59 100644
--- a/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.cc
@@ -189,7 +189,8 @@ int ReduceInt8CPUKernel::MallocTmpBuffer() {
         size *= input_shape[j];
       }
     }
-    int32_t *buffer = reinterpret_cast<int32_t *>(malloc(size * sizeof(int32_t)));
+    MS_ASSERT(context_->allocator != nullptr);
+    int32_t *buffer = reinterpret_cast<int32_t *>(context_->allocator->Malloc(size * sizeof(int32_t)));
     if (buffer == nullptr) {
       MS_LOG(ERROR) << "Malloc data failed.";
       return RET_ERROR;
@@ -199,7 +200,7 @@ int ReduceInt8CPUKernel::MallocTmpBuffer() {
   }
 
   auto input = in_tensors_.at(0);
-  begin_src_data_ = reinterpret_cast<int32_t *>(malloc(sizeof(int32_t) * input->ElementsNum()));
+  begin_src_data_ = reinterpret_cast<int32_t *>(context_->allocator->Malloc(sizeof(int32_t) * input->ElementsNum()));
   if (begin_src_data_ == nullptr) {
     return RET_NULL_PTR;
   }
@@ -210,6 +211,32 @@ int ReduceInt8CPUKernel::MallocTmpBuffer() {
   return RET_OK;
 }
 
+void ReduceInt8CPUKernel::FreeTmpBuffer() {
+  for (auto buffer : data_buffers_) {
+    if (buffer != nullptr) {
+      MS_ASSERT(context_->allocator != nullptr);
+      context_->allocator->Free(buffer);
+      buffer = nullptr;
+    }
+  }
+  data_buffers_.clear();
+
+  if (begin_src_data_ != nullptr) {
+    MS_ASSERT(context_->allocator != nullptr);
+    context_->allocator->Free(begin_src_data_);
+    begin_src_data_ = nullptr;
+  }
+}
+
+int ReduceInt8CPUKernel::ReSize() {
+  FreeTmpBuffer();
+  auto ret = MallocTmpBuffer();
+  if (ret != RET_OK) {
+    FreeTmpBuffer();
+  }
+  return ret;
+}
+
 int ReduceInt8Impl(int task_id, LiteParallelGroupEnv *penv, void *cdata) {
   auto reduce = reinterpret_cast<ReduceInt8CPUKernel *>(cdata);
   auto error_code = reduce->CallReduceUnit(task_id);
@@ -261,6 +288,7 @@ int ReduceInt8CPUKernel::Run() {
     axis_size_ = tmp_shape_[axis];
     auto error_code = LiteBackendParallelLaunch(ReduceInt8Impl, this, context_->thread_num_);
     if (error_code != RET_OK) {
+      FreeTmpBuffer();
       MS_LOG(ERROR) << "Reduce run error, error_code[" << error_code << "]";
       return RET_ERROR;
     }
@@ -298,14 +326,11 @@ int ReduceInt8CPUKernel::Run() {
   auto error_code = LiteBackendParallelLaunch(ReduceInt8Impl, this, context_->thread_num_);
   if (error_code != RET_OK) {
     MS_LOG(ERROR) << "Reduce run error, error_code[" << error_code << "]";
+    FreeTmpBuffer();
     return RET_ERROR;
   }
 
-  if (begin_src_data_ != nullptr) {
-    free(begin_src_data_);
-    begin_src_data_ = nullptr;
-  }
-
+  FreeTmpBuffer();
   return RET_OK;
 }
 
diff --git a/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.h b/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.h
index 800c8d69b37..e4bbdb3e54e 100644
--- a/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.h
+++ b/mindspore/lite/src/runtime/kernel/arm/int8/reduce_int8.h
@@ -40,13 +40,6 @@ class ReduceInt8CPUKernel : public ReduceBaseCPUKernel {
                       const mindspore::lite::PrimitiveC *primitive)
       : ReduceBaseCPUKernel(param, inputs, outputs, ctx, primitive) {}
   ~ReduceInt8CPUKernel() {
-    for (auto i = 0; i < data_buffers_.size(); i++) {
-      int32_t *buffer = data_buffers_[i];
-      if (buffer != nullptr) {
-        free(buffer);
-        buffer = nullptr;
-      }
-    }
     for (auto qm : mean_multipliers_) {
       delete qm;
       qm = nullptr;
@@ -64,7 +57,7 @@ class ReduceInt8CPUKernel : public ReduceBaseCPUKernel {
   }
 
   int Init() override;
-  int ReSize() override { return 0; };
+  int ReSize() override;
   int Run() override;
   int CallReduceUnit(int task_id);
   int ReduceLastAxis(int task_id);
@@ -74,6 +67,7 @@ class ReduceInt8CPUKernel : public ReduceBaseCPUKernel {
 
  private:
   int MallocTmpBuffer();
+  void FreeTmpBuffer();
   int CalculateQuantArgs();
 
  private: