diff --git a/mindspore/lite/src/ops/custom_extract_features.cc b/mindspore/lite/src/ops/custom_extract_features.cc
index 601c1321e6..27c68cd5e1 100644
--- a/mindspore/lite/src/ops/custom_extract_features.cc
+++ b/mindspore/lite/src/ops/custom_extract_features.cc
@@ -34,26 +34,27 @@ int CustomExtractFeatures::UnPackToFlatBuilder(const schema::Primitive *primitiv
 
 int CustomExtractFeatures::InferShape(std::vector<Tensor *> inputs_, std::vector<Tensor *> outputs_) {
   auto input = inputs_.at(0);
-  MS_ASSERT(input != nullptr);
-  if (input->data_c() == nullptr) {
-    MS_LOG(INFO) << "Do infer shape in runtime.";
-    return RET_INFER_INVALID;
-  }
-  int string_num = lite::GetStringCount(input);
   auto output0 = outputs_.at(0);
   auto output1 = outputs_.at(1);
+  MS_ASSERT(input != nullptr);
   MS_ASSERT(output0 != nullptr);
   MS_ASSERT(output1 != nullptr);
 
+  output0->set_data_type(input->data_type());
+  output0->SetFormat(input->GetFormat());
+  output1->set_data_type(input->data_type());
+  output1->SetFormat(input->GetFormat());
+
+  if (input->data_c() == nullptr) {
+    MS_LOG(INFO) << "Do infer shape in runtime.";
+    return RET_INFER_INVALID;
+  }
   std::vector<int> shape;
+  int string_num = lite::GetStringCount(input);
   shape.push_back(string_num == 0 ? 1 : string_num);
 
   output0->set_shape(shape);
-  output0->set_data_type(input->data_type());
-  output0->SetFormat(input->GetFormat());
   output1->set_shape(shape);
-  output1->set_data_type(input->data_type());
-  output1->SetFormat(input->GetFormat());
   return RET_OK;
 }
 }  // namespace lite
diff --git a/mindspore/lite/src/ops/hashtable_lookup.cc b/mindspore/lite/src/ops/hashtable_lookup.cc
index cd2e95371b..f1c3652217 100644
--- a/mindspore/lite/src/ops/hashtable_lookup.cc
+++ b/mindspore/lite/src/ops/hashtable_lookup.cc
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 #include "src/ops/hashtable_lookup.h"
+#include "src/common/string_util.h"
 
 namespace mindspore {
 namespace lite {
@@ -30,8 +31,34 @@ int HashtableLookup::UnPackToFlatBuilder(const schema::Primitive *primitive, fla
 }
 #endif
 int HashtableLookup::InferShape(std::vector<Tensor *> inputs_, std::vector<Tensor *> outputs_) {
-  PrimitiveC::InferShape(inputs_, outputs_);
-  return RET_INFER_INVALID;
+  auto input = inputs_.at(0);
+  auto values = inputs_.at(2);
+  auto output = outputs_.at(0);
+  auto hits = outputs_.at(1);
+  MS_ASSERT(input != nullptr);
+  MS_ASSERT(keys != nullptr);
+  MS_ASSERT(values != nullptr);
+  MS_ASSERT(output != nullptr);
+  MS_ASSERT(hits != nullptr);
+
+  std::vector<int> hits_shape;
+  hits_shape.push_back(input->DimensionSize(0));
+
+  output->set_data_type(values->data_type());
+  output->SetFormat(input->GetFormat());
+  hits->set_shape(hits_shape);
+  hits->set_data_type(kNumberTypeUInt8);
+  hits->SetFormat(input->GetFormat());
+
+  if (input->data_c() == nullptr) {
+    MS_LOG(INFO) << "Do infer shape in runtime.";
+    return RET_INFER_INVALID;
+  }
+  int string_num = lite::GetStringCount(input);
+  std::vector<int> output_shape;
+  output_shape.push_back(string_num == 0 ? 1 : string_num);
+  output->set_shape(output_shape);
+  return RET_OK;
 }
 }  // namespace lite
 }  // namespace mindspore
diff --git a/mindspore/lite/src/populate_parameter.cc b/mindspore/lite/src/populate_parameter.cc
index 59983c1974..78561749e2 100644
--- a/mindspore/lite/src/populate_parameter.cc
+++ b/mindspore/lite/src/populate_parameter.cc
@@ -1746,6 +1746,7 @@ PopulateParameterRegistry::PopulateParameterRegistry() {
   populate_parameter_funcs_[schema::PrimitiveType_SkipGram] = PopulateSkipGramParameter;
   populate_parameter_funcs_[schema::PrimitiveType_CustomExtractFeatures] = PopulateCommonOpParameter;
   populate_parameter_funcs_[schema::PrimitiveType_CustomPredict] = PopulateCustomPredictParameter;
+  populate_parameter_funcs_[schema::PrimitiveType_HashtableLookup] = PopulateCommonOpParameter;
 }
 
 PopulateParameterRegistry *PopulateParameterRegistry::GetInstance() {
diff --git a/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.cc b/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.cc
new file mode 100644
index 0000000000..8a87074b15
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.cc
@@ -0,0 +1,96 @@
+/**
+ * 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 "src/runtime/kernel/arm/string/hashtable_lookup.h"
+#include <string>
+#include <algorithm>
+#include "src/kernel_registry.h"
+#include "src/common/string_util.h"
+
+using mindspore::lite::KernelRegistrar;
+using mindspore::schema::PrimitiveType_HashtableLookup;
+
+namespace mindspore::kernel {
+int HashtableLookupCPUKernel::Init() {
+  if (!InferShapeDone()) {
+    return RET_OK;
+  }
+  return ReSize();
+}
+
+int HashtableLookupCPUKernel::ReSize() { return RET_OK; }
+
+static int CmpKeyFunc(const void *lhs, const void *rhs) {
+  return *static_cast<const int *>(lhs) - *static_cast<const int *>(rhs);
+}
+
+int HashtableLookupCPUKernel::Run() {
+  auto ret = Prepare();
+  if (ret != RET_OK) {
+    MS_LOG(ERROR) << "Prepare fail! Ret error code: " << ret;
+    return ret;
+  }
+  auto input_tensor = in_tensors_.at(0);
+  auto keys_tensor = in_tensors_.at(1);
+  auto values_tensor = in_tensors_.at(2);
+  auto output_tensor = out_tensors_.at(0);
+  auto hits_tensor = out_tensors_.at(1);
+
+  int rows = values_tensor->DimensionSize(0);
+  int32_t *input_data = reinterpret_cast<int32_t *>(input_tensor->MutableData());
+  uint8_t *hits_data = reinterpret_cast<uint8_t *>(hits_tensor->MutableData());
+  std::vector<lite::StringPack> output_string_pack;
+  std::vector<lite::StringPack> all_string_pack = ParseTensorBuffer(input_tensor);
+
+  for (int i = 0; i < input_tensor->ElementsNum(); i++) {
+    int index = -1;
+    void *p = bsearch(&(input_data[i]), keys_tensor->MutableData(), rows, sizeof(int32_t), CmpKeyFunc);
+    if (p != nullptr) {
+      index = reinterpret_cast<int32_t *>(p) - reinterpret_cast<int32_t *>(keys_tensor->MutableData());
+    }
+    if (index >= rows || index < 0) {
+      lite::StringPack tmp = {0, nullptr};
+      output_string_pack.push_back(tmp);
+      hits_data[i] = 0;
+    } else {
+      output_string_pack.push_back(all_string_pack[i]);
+      hits_data[i] = 1;
+    }
+  }
+  WriteStringsToTensor(output_tensor, output_string_pack);
+  return RET_OK;
+}
+
+kernel::LiteKernel *CpuHashtableLookupKernelCreator(const std::vector<lite::Tensor *> &inputs,
+                                                    const std::vector<lite::Tensor *> &outputs, OpParameter *parameter,
+                                                    const lite::InnerContext *ctx, const kernel::KernelKey &desc,
+                                                    const mindspore::lite::PrimitiveC *primitive) {
+  auto *kernel = new (std::nothrow) HashtableLookupCPUKernel(parameter, inputs, outputs, ctx, primitive);
+  if (kernel == nullptr) {
+    MS_LOG(ERROR) << "new HashtableLookupCPUKernel fail!";
+    return nullptr;
+  }
+  auto ret = kernel->Init();
+  if (ret != RET_OK) {
+    MS_LOG(ERROR) << "Init kernel failed, name: " << parameter->name_
+                  << ", type: " << schema::EnumNamePrimitiveType(static_cast<schema::PrimitiveType>(parameter->type_));
+    delete kernel;
+    return nullptr;
+  }
+  return kernel;
+}
+
+REG_KERNEL(kCPU, kNumberTypeFloat32, PrimitiveType_HashtableLookup, CpuHashtableLookupKernelCreator)
+}  // namespace mindspore::kernel
diff --git a/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.h b/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.h
new file mode 100644
index 0000000000..75faadebdc
--- /dev/null
+++ b/mindspore/lite/src/runtime/kernel/arm/string/hashtable_lookup.h
@@ -0,0 +1,38 @@
+/**
+ * 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_SRC_RUNTIME_KERNEL_ARM_STRING_HASHTABLE_LOOKUP_H_
+#define MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_STRING_HASHTABLE_LOOKUP_H_
+
+#include <vector>
+#include "src/lite_kernel.h"
+#include "include/context.h"
+
+namespace mindspore::kernel {
+class HashtableLookupCPUKernel : public LiteKernel {
+ public:
+  HashtableLookupCPUKernel(OpParameter *parameter, const std::vector<lite::Tensor *> &inputs,
+                           const std::vector<lite::Tensor *> &outputs, const lite::InnerContext *ctx,
+                           const mindspore::lite::PrimitiveC *primitive)
+      : LiteKernel(parameter, inputs, outputs, ctx, primitive) {}
+  ~HashtableLookupCPUKernel() {}
+
+  int Init() override;
+  int ReSize() override;
+  int Run() override;
+};
+}  // namespace mindspore::kernel
+
+#endif  // MINDSPORE_LITE_SRC_RUNTIME_KERNEL_ARM_STRING_HASHTABLE_LOOKUP_H_
diff --git a/mindspore/lite/src/runtime/kernel/arm/string/predict.cc b/mindspore/lite/src/runtime/kernel/arm/string/predict.cc
index c56c2a978d..dd30921f17 100644
--- a/mindspore/lite/src/runtime/kernel/arm/string/predict.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/string/predict.cc
@@ -68,7 +68,7 @@ std::vector<LabelInfo> PredictCPUKernel::GetLabelInfo() {
   return label_info_vec;
 }
 
-bool LabelInfoCmp(const LabelInfo &lhs, const LabelInfo &rhs) { return lhs.weight > rhs.weight; }
+static bool LabelInfoCmp(const LabelInfo &lhs, const LabelInfo &rhs) { return lhs.weight > rhs.weight; }
 
 int PredictCPUKernel::Run() {
   auto ret = Prepare();