diff --git a/lite/kernels/arm/CMakeLists.txt b/lite/kernels/arm/CMakeLists.txt
index 60d5d67202542a9eea2713247958afcf4000e008..49078844354c8597ea489a986826edbdbcc9eb62 100644
--- a/lite/kernels/arm/CMakeLists.txt
+++ b/lite/kernels/arm/CMakeLists.txt
@@ -88,6 +88,7 @@ add_kernel(gru_unit_compute_arm ARM extra SRCS gru_unit_compute.cc DEPS ${lite_k
 add_kernel(gru_compute_arm ARM extra SRCS gru_compute.cc DEPS ${lite_kernel_deps} math_arm)
 add_kernel(beam_search_decode_compute_arm ARM extra SRCS beam_search_decode_compute.cc DEPS ${lite_kernel_deps} math_arm)
 add_kernel(lookup_table_compute_arm ARM extra SRCS lookup_table_compute.cc DEPS ${lite_kernel_deps} math_arm)
+add_kernel(lookup_table_dequant_compute_arm ARM extra SRCS lookup_table_dequant_compute.cc DEPS ${lite_kernel_deps} math_arm)
 add_kernel(logical_compute_arm ARM extra SRCS logical_compute.cc DEPS ${lite_kernel_deps} math_arm)
 add_kernel(sequence_softmax_compute_arm ARM extra SRCS sequence_softmax_compute.cc DEPS ${lite_kernel_deps} math_arm)
 add_kernel(less_than_arm ARM extra SRCS compare_compute.cc DEPS ${lite_kernel_deps} math_arm)
diff --git a/lite/kernels/arm/lookup_table_dequant_compute.cc b/lite/kernels/arm/lookup_table_dequant_compute.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6127e4279b14c40af1cde14b267581426f9ffaa1
--- /dev/null
+++ b/lite/kernels/arm/lookup_table_dequant_compute.cc
@@ -0,0 +1,100 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "lite/kernels/arm/lookup_table_dequant_compute.h"
+#include <string>
+#include <vector>
+#include "lite/api/paddle_place.h"
+#include "lite/backends/arm/math/funcs.h"
+#include "lite/core/op_registry.h"
+#include "lite/core/tensor.h"
+#include "lite/core/type_system.h"
+
+namespace paddle {
+namespace lite {
+namespace kernels {
+namespace arm {
+
+void dequant(const unsigned char *in,
+             float *out,
+             float min,
+             float max,
+             int emb_size,
+             int pow_2_bits) {
+  float scale = (max - min) / pow_2_bits;
+  for (int i = 0; i < emb_size; ++i) {
+    float x = scale * static_cast<int>(in[i]) + min;
+    out[i] = x;
+  }
+}
+
+void LookupTableDequantCompute::Run() {
+  auto &param = this->Param<param_t>();
+  // inputs
+  auto w = param.W;
+  auto ids = param.Ids;
+  // outputs
+  auto out = param.Out;
+
+  auto table_dim = w->dims();
+  int64_t ids_numel = ids->numel();
+  auto ids_data = ids->data<int64_t>();
+
+  int64_t row_number = table_dim[0];
+  int64_t quant_number = table_dim[1];
+  int64_t row_width = (quant_number - 2) * 4;
+
+  auto table_data = w->data<float>();
+  auto dout = out->mutable_data<float>();
+  int pow_2_bits = static_cast<int>(pow(2, 8));
+
+  for (int64_t i = 0; i < ids_numel; ++i) {
+    int ids_int = ids_data[i];
+    if (param.padding_idx != -1 && ids_data[i] == param.padding_idx) {
+      memset(dout + i * row_width, 0, row_width * sizeof(float));
+    } else {
+      CHECK_LT(ids_data[i], row_number)
+          << "look uptable ids[i] < row_number check failed";
+      CHECK_GE(ids_data[i], 0) << "lookuptable ids[i] >= 0 check failed";
+      float min = *(table_data + ids_data[i] * quant_number);
+      float max = *(table_data + ids_data[i] * quant_number + 1);
+      int offset = ids_data[i] * quant_number + 2;
+      const unsigned char *tensor_buf =
+          reinterpret_cast<const unsigned char *>(table_data + offset);
+      dequant(
+          tensor_buf, dout + i * row_width, min, max, row_width, pow_2_bits);
+
+      // memcpy(dout + i * row_width,
+      //       table_data + ids_int * row_width,
+      //       row_width * sizeof(float));
+    }
+  }
+  *(out->mutable_lod()) = ids->lod();
+}
+
+}  // namespace arm
+}  // namespace kernels
+}  // namespace lite
+}  // namespace paddle
+
+REGISTER_LITE_KERNEL(lookup_table_dequant,
+                     kARM,
+                     kAny,
+                     kNCHW,
+                     paddle::lite::kernels::arm::LookupTableDequantCompute,
+                     def)
+    .BindInput("W", {LiteType::GetTensorTy(TARGET(kARM))})
+    .BindInput("Ids", {LiteType::GetTensorTy(TARGET(kARM), PRECISION(kInt64))})
+    .BindOutput("Out", {LiteType::GetTensorTy(TARGET(kARM))})
+    .Finalize();
diff --git a/lite/kernels/arm/lookup_table_dequant_compute.h b/lite/kernels/arm/lookup_table_dequant_compute.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1a41dcdf20fb287d3cc2022832cbb9a25e93eb4
--- /dev/null
+++ b/lite/kernels/arm/lookup_table_dequant_compute.h
@@ -0,0 +1,39 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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.
+
+#pragma once
+#include <algorithm>
+#include "lite/core/kernel.h"
+
+namespace paddle {
+namespace lite {
+namespace kernels {
+namespace arm {
+
+class LookupTableDequantCompute
+    : public KernelLite<TARGET(kARM), PRECISION(kAny)> {
+ public:
+  using param_t = operators::LookupTableDequantParam;
+
+  LookupTableDequantCompute() = default;
+
+  void Run() override;
+
+  virtual ~LookupTableDequantCompute() = default;
+};
+
+}  // namespace arm
+}  // namespace kernels
+}  // namespace lite
+}  // namespace paddle
diff --git a/lite/operators/CMakeLists.txt b/lite/operators/CMakeLists.txt
index d4fc74e2c5bb0cc9e23e97a73ef514be7e9b6af6..512473c7d52d0f43b01611048012a8c54e2b7244 100644
--- a/lite/operators/CMakeLists.txt
+++ b/lite/operators/CMakeLists.txt
@@ -109,6 +109,7 @@ add_operator(distribute_fpn_proposals_op_lite extra SRCS distribute_fpn_proposal
 # for OCR specific
 add_operator(while_op extra SRCS while_op.cc DEPS ${op_DEPS})
 add_operator(lookup_table_op extra SRCS lookup_table_op.cc DEPS ${op_DEPS})
+add_operator(lookup_table_dequant_op extra SRCS lookup_table_dequant_op.cc DEPS ${op_DEPS})
 add_operator(lookup_table_v2_op extra SRCS lookup_table_v2_op.cc DEPS ${op_DEPS})
 add_operator(beam_search_decode_op extra SRCS beam_search_decode_op.cc DEPS ${op_DEPS})
 add_operator(logical_xor  extra SRCS logical_op.cc DEPS ${op_DEPS})
diff --git a/lite/operators/lookup_table_dequant_op.cc b/lite/operators/lookup_table_dequant_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b81043bfbfeed356e3d67065686057adfadcb25f
--- /dev/null
+++ b/lite/operators/lookup_table_dequant_op.cc
@@ -0,0 +1,72 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "lite/operators/lookup_table_dequant_op.h"
+#include "lite/core/op_lite.h"
+#include "lite/core/op_registry.h"
+
+namespace paddle {
+namespace lite {
+namespace operators {
+
+bool LookupTableDequantOpLite::CheckShape() const {
+  CHECK_OR_FALSE(param_.W)
+  CHECK_OR_FALSE(param_.Ids)
+  CHECK_OR_FALSE(param_.Out)
+
+  const auto& table_dims = param_.W->dims();
+  const auto& ids_dims = param_.Ids->dims();
+
+  int ids_rank = ids_dims.size();
+
+  CHECK_EQ_OR_FALSE(table_dims.size(), 2);
+  CHECK_EQ_OR_FALSE(ids_dims[ids_rank - 1], 1);
+  CHECK_GT_OR_FALSE(table_dims[1], 2);
+  return true;
+}
+
+bool LookupTableDequantOpLite::InferShape() const {
+  const auto& table_dims = param_.W->dims();
+  const auto& ids_dims = param_.Ids->dims();
+
+  auto out_dims = ids_dims;
+  int ids_rank = ids_dims.size();
+  out_dims[ids_rank - 1] = (table_dims[1] - 2) * 4;
+
+  param_.Out->Resize(out_dims);
+  param_.Out->set_lod(param_.Ids->lod());
+  return true;
+}
+
+bool LookupTableDequantOpLite::AttachImpl(const cpp::OpDesc& op_desc,
+                                          lite::Scope* scope) {
+  auto input = op_desc.Input("W").front();
+  auto ids = op_desc.Input("Ids").front();
+  auto out = op_desc.Output("Out").front();
+
+  param_.W = scope->FindVar(input)->GetMutable<lite::Tensor>();
+  param_.Ids = scope->FindVar(ids)->GetMutable<lite::Tensor>();
+  param_.Out = scope->FindVar(out)->GetMutable<lite::Tensor>();
+
+  param_.padding_idx = op_desc.GetAttr<int64_t>("padding_idx");
+
+  return true;
+}
+
+}  // namespace operators
+}  // namespace lite
+}  // namespace paddle
+
+REGISTER_LITE_OP(lookup_table_dequant,
+                 paddle::lite::operators::LookupTableDequantOpLite)
diff --git a/lite/operators/lookup_table_dequant_op.h b/lite/operators/lookup_table_dequant_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..3a9683d5ca0d87365cb240b91dccab07cf26ca71
--- /dev/null
+++ b/lite/operators/lookup_table_dequant_op.h
@@ -0,0 +1,47 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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.
+
+#pragma once
+#include <string>
+#include <vector>
+#include "lite/core/op_lite.h"
+#include "lite/core/scope.h"
+#include "lite/utils/all.h"
+
+namespace paddle {
+namespace lite {
+namespace operators {
+
+class LookupTableDequantOpLite : public OpLite {
+ public:
+  LookupTableDequantOpLite() {}
+  explicit LookupTableDequantOpLite(const std::string &op_type)
+      : OpLite(op_type) {}
+
+  bool CheckShape() const override;
+
+  bool InferShape() const override;
+
+  bool AttachImpl(const cpp::OpDesc &opdesc, lite::Scope *scope) override;
+
+  void AttachKernel(KernelBase *kernel) override { kernel->SetParam(param_); }
+  std::string DebugString() const override { return "LookupTableDequant"; }
+
+ private:
+  mutable LookupTableDequantParam param_;
+};
+
+}  // namespace operators
+}  // namespace lite
+}  // namespace paddle
diff --git a/lite/operators/op_params.h b/lite/operators/op_params.h
index 25bbcc7687dd3000301f95c7ab365d2157f196dd..0ca7e3d2a832283af1582ae28626a9c4b3936005 100644
--- a/lite/operators/op_params.h
+++ b/lite/operators/op_params.h
@@ -661,6 +661,13 @@ struct LookupTableParam {
   int64_t padding_idx{-1};
 };
 
+struct LookupTableDequantParam {
+  lite::Tensor* W{nullptr};
+  lite::Tensor* Ids{nullptr};
+  lite::Tensor* Out{nullptr};
+  int64_t padding_idx{-1};
+};
+
 struct Im2SequenceParam {
   const lite::Tensor* X{};
   const lite::Tensor* Y{};
diff --git a/lite/tests/kernels/CMakeLists.txt b/lite/tests/kernels/CMakeLists.txt
index 54e85e14a0276fdc5543d7369bb4c7f044e87974..6d63b7054176fae6d2c88cf2e330fce2c6f7eb6f 100644
--- a/lite/tests/kernels/CMakeLists.txt
+++ b/lite/tests/kernels/CMakeLists.txt
@@ -58,6 +58,7 @@ if(LITE_BUILD_EXTRA)
     lite_cc_test(test_kernel_search_aligned_mat_mul_compute SRCS search_aligned_mat_mul_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${x86_kernels} ${bm_kernels} ${cuda_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
     lite_cc_test(test_kernel_search_seq_fc_compute SRCS search_seq_fc_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${x86_kernels} ${cuda_kernels} ${bm_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
     lite_cc_test(test_kernel_lookup_table_compute SRCS lookup_table_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${bm_kernels} ${x86_kernels} ${cuda_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
+    lite_cc_test(test_kernel_lookup_table_dequant_compute SRCS lookup_table_dequant_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${bm_kernels} ${x86_kernels} ${cuda_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
     lite_cc_test(test_kernel_gather_compute SRCS gather_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${x86_kernels} ${bm_kernels} ${cuda_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
 endif()
     lite_cc_test(test_kernel_pad2d_compute SRCS  pad2d_compute_test.cc DEPS arena_framework ${xpu_kernels} ${npu_kernels} ${bm_kernels} ${x86_kernels} ${cuda_kernels} ${arm_kernels} ${lite_ops} ${host_kernels})
diff --git a/lite/tests/kernels/lookup_table_dequant_compute_test.cc b/lite/tests/kernels/lookup_table_dequant_compute_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..30f551e8b7e29ef373145bdb3496c1885907531a
--- /dev/null
+++ b/lite/tests/kernels/lookup_table_dequant_compute_test.cc
@@ -0,0 +1,150 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 <gtest/gtest.h>
+#include "lite/api/paddle_use_kernels.h"
+#include "lite/api/paddle_use_ops.h"
+#include "lite/core/arena/framework.h"
+#include "lite/tests/utils/fill_data.h"
+
+namespace paddle {
+namespace lite {
+
+void dequant(const unsigned char* in,
+             float* out,
+             float min,
+             float max,
+             int emb_size,
+             int pow_2_bits) {
+  float scale = (max - min) / pow_2_bits;
+  for (int i = 0; i < emb_size; ++i) {
+    float x = scale * static_cast<int>(in[i]) + min;
+    out[i] = x;
+  }
+}
+
+class LookupTableDequantComputeTest : public arena::TestCase {
+ protected:
+  // common attributes for this op.
+  std::string op_type_ = "lookup_table_dequant";
+  std::string ids_ = "ids";
+  std::string w_ = "w";
+  std::string out_ = "out";
+  DDim ids_dims_{{2, 1}};
+  DDim w_dims_{{8, 4}};
+  int64_t padding_idx_ = -1;
+
+ public:
+  LookupTableDequantComputeTest(const Place& place,
+                                const std::string& alias,
+                                const DDim& ids_dims,
+                                const DDim& w_dims,
+                                int64_t padding_idx)
+      : TestCase(place, alias),
+        ids_dims_(ids_dims),
+        w_dims_(w_dims),
+        padding_idx_(padding_idx) {}
+
+  void RunBaseline(Scope* scope) override {
+    auto ids = scope->FindTensor(ids_);
+    auto w = scope->FindTensor(w_);
+    auto ids_dims = ids->dims();
+    auto w_dims = w->dims();
+
+    auto out = scope->NewTensor(out_);
+    CHECK(out);
+
+    int ids_rank = ids_dims.size();
+    CHECK_EQ(ids_dims[ids_rank - 1], 1);
+    CHECK_EQ(w_dims.size(), 2);
+
+    std::vector<int64_t> out_dims;
+    for (int i = 0; i < ids_rank - 1; ++i) {
+      out_dims.push_back(ids_dims[i]);
+    }
+    out_dims.push_back((w_dims[1] - 2) * 4);
+    out->Resize(out_dims);
+    out->set_lod(ids->lod());
+
+    auto ids_data = ids->data<int64_t>();
+    auto ids_size = ids_dims.production();
+    auto w_data = w->data<float>();
+    auto w_rows = w_dims[0];
+    auto quant_number = w_dims[1];
+    auto w_cols = (quant_number - 2) * 4;
+    auto out_data = out->mutable_data<float>();
+    int pow_2_bits = static_cast<int>(pow(2, 8));
+
+    for (int64_t i = 0; i < ids_size; i++) {
+      auto id = ids_data[i];
+      if (padding_idx_ != -1 && id == padding_idx_) {
+        memset(out_data + i * w_cols, 0, w_cols * sizeof(float));
+      } else {
+        CHECK_LT(id, w_rows) << "lookup_table ids[i] expected < " << w_rows
+                             << " but got " << id;
+        CHECK_GE(id, 0) << "lookup_table ids[i] expected >= 0 but got " << id;
+        float min = *(w_data + ids_data[i] * quant_number);
+        float max = *(w_data + ids_data[i] * quant_number + 1);
+        int offset = ids_data[i] * quant_number + 2;
+        const unsigned char* tensor_buf =
+            reinterpret_cast<const unsigned char*>(w_data + offset);
+        dequant(
+            tensor_buf, out_data + i * w_cols, min, max, w_cols, pow_2_bits);
+      }
+    }
+  }
+
+  void PrepareOpDesc(cpp::OpDesc* op_desc) {
+    op_desc->SetType(op_type_);
+    op_desc->SetInput("Ids", {ids_});
+    op_desc->SetInput("W", {w_});
+    op_desc->SetOutput("Out", {out_});
+    op_desc->SetAttr<int64_t>("padding_idx", padding_idx_);
+  }
+
+  void PrepareData() override {
+    std::vector<int64_t> ids(ids_dims_.production());
+    fill_data_rand<int64_t>(
+        ids.data(), 0, w_dims_[0] - 1, ids_dims_.production());
+
+    std::vector<float> w(w_dims_.production());
+    fill_data_rand(w.data(), -1.f, 1.f, w_dims_.production());
+
+    SetCommonTensor(ids_, ids_dims_, ids.data());
+    SetCommonTensor(w_, w_dims_, w.data());
+  }
+};
+
+TEST(LookupTableDequant, precision) {
+#ifdef LITE_WITH_ARM
+  float abs_error = 2e-5;
+  Place place = {TARGET(kARM), PRECISION(kAny)};
+  for (auto ids_dims :
+       std::vector<std::vector<int64_t>>{{5, 2, 3, 1}, {2, 3, 1}, {3, 1}}) {
+    for (auto w_dims :
+         std::vector<std::vector<int64_t>>{{4, 3}, {6, 8}, {12, 15}}) {
+      for (auto padding_idx : std::vector<int64_t>{-1}) {
+        std::unique_ptr<arena::TestCase> tester(
+            new LookupTableDequantComputeTest(
+                place, "def", DDim(ids_dims), DDim(w_dims), padding_idx));
+        arena::Arena arena(std::move(tester), place, abs_error);
+        arena.TestPrecision();
+      }
+    }
+  }
+#endif
+}
+
+}  // namespace lite
+}  // namespace paddle