diff --git a/lite/backends/cuda/math/gru_forward.h b/lite/backends/cuda/math/gru_forward.h
index 22d4ae3a9d0b1e807230149aa36b96b3c471227b..3a1648c437e860bec07fbec7bbbd69b659a58407 100644
--- a/lite/backends/cuda/math/gru_forward.h
+++ b/lite/backends/cuda/math/gru_forward.h
@@ -30,9 +30,16 @@ namespace lite {
 namespace cuda {
 namespace math {
 
+#define SIGMOID_THRESHOLD_MIN -40.0
+#define SIGMOID_THRESHOLD_MAX 13.0
+#define EXP_MAX_INPUT 40.0
+
 template <typename Dtype>
 inline __device__ Dtype Sigmoid(const Dtype a) {
-  return static_cast<Dtype>(1.0) / (static_cast<Dtype>(1.0) + expf(-a));
+  const Dtype min = SIGMOID_THRESHOLD_MIN;
+  const Dtype max = SIGMOID_THRESHOLD_MAX;
+  Dtype tmp = (a < min) ? min : ((a > max) ? max : a);
+  return static_cast<Dtype>(1.0) / (static_cast<Dtype>(1.0) + expf(-tmp));
 }
 
 template <>
@@ -63,6 +70,7 @@ inline __device__ half ReLU(const half a) {
 template <typename Dtype>
 inline __device__ Dtype Tanh(const Dtype a) {
   Dtype tmp = static_cast<Dtype>(-2.0) * a;
+  tmp = (tmp > EXP_MAX_INPUT) ? EXP_MAX_INPUT : tmp;
   return (static_cast<Dtype>(2.0) / (static_cast<Dtype>(1.0) + expf(tmp))) -
          static_cast<Dtype>(1.0);
 }
diff --git a/lite/backends/cuda/math/scale.cu b/lite/backends/cuda/math/scale.cu
index 806a3697a2eb19354a81056f0a7ab6272ed991a1..f9d5209c3e4af11231f4b62531f9eb11ede56557 100644
--- a/lite/backends/cuda/math/scale.cu
+++ b/lite/backends/cuda/math/scale.cu
@@ -22,10 +22,6 @@ namespace lite {
 namespace cuda {
 namespace math {
 
-#define CUDA_KERNEL_LOOP(i, n)                                 \
-  for (int i = blockIdx.x * blockDim.x + threadIdx.x; i < (n); \
-       i += blockDim.x * gridDim.x)
-
 template <typename T>
 __global__ void scale_kernel(int count,
                              const T* in_data,
@@ -48,7 +44,6 @@ __global__ void scale_kernel(int count,
 template <typename T>
 __global__ void scale_kernel(
     int count, const T* in_data, T* out_data, const T scale, const T bias) {
-  int tid = blockIdx.x * blockDim.x + threadIdx.x;
   CUDA_KERNEL_LOOP(tid, count) { out_data[tid] = scale * in_data[tid] + bias; }
 }
 
@@ -133,12 +128,11 @@ void fp32_scale_nhwc(int num,
 }
 
 template <typename T>
-void scale(int num, const T* in, T* out, T scale, cudaStream_t stream, T bias) {
+void scale(int num, const T* in, T* out, T scale, T bias, cudaStream_t stream) {
   int thread = 256;
   int block = (num + thread - 1) / thread;
   scale_kernel<<<block, thread, 0, stream>>>(num, in, out, scale, bias);
-  cudaError_t error = cudaGetLastError();
-  if (error != cudaSuccess) std::cout << cudaGetErrorString(error);
+  CUDA_POST_KERNEL_CHECK;
 }
 
 template <typename T>
@@ -146,11 +140,10 @@ void scale(int num, const T* in, T* out, T scale, T bias) {
   int thread = 256;
   int block = (num + thread - 1) / thread;
   scale_kernel<<<block, thread>>>(num, in, out, scale, bias);
-  cudaError_t error = cudaGetLastError();
-  if (error != cudaSuccess) std::cout << cudaGetErrorString(error);
+  CUDA_POST_KERNEL_CHECK;
 }
 
-template void scale(int num, const float*, float*, float, cudaStream_t, float);
+template void scale(int num, const float*, float*, float, float, cudaStream_t);
 template void scale(int num, const float*, float*, float, float);
 
 }  // namespace math
diff --git a/lite/backends/cuda/math/scale.h b/lite/backends/cuda/math/scale.h
index 52ed1d38ae79ce11cac50a9abef0f57e6de1352c..b9961b12c3c251ffb7f80589fa8c9ccb12d96e30 100644
--- a/lite/backends/cuda/math/scale.h
+++ b/lite/backends/cuda/math/scale.h
@@ -32,8 +32,7 @@ void fp32_scale_nhwc(int num,
                      cudaStream_t stream);
 
 template <typename T>
-void scale(
-    int num, const T* in, T* out, T scale, cudaStream_t stream, T bias = 0);
+void scale(int num, const T* in, T* out, T scale, T bias, cudaStream_t stream);
 
 template <typename T>
 void scale(int num, const T* in, T* out, T scale, T bias = 0);
diff --git a/lite/backends/cuda/math/sequence2batch.cu b/lite/backends/cuda/math/sequence2batch.cu
index edc2a1ec084e0c619fbf15f3494a821ed8cbdc45..9a93362b3bb163b889049d07186634987ed63940 100644
--- a/lite/backends/cuda/math/sequence2batch.cu
+++ b/lite/backends/cuda/math/sequence2batch.cu
@@ -32,7 +32,7 @@ __global__ void CopyMatrixRowsKernel(const T* src,
                                      bool is_src_index) {
   int idx = threadIdx.x;
   int idy = threadIdx.y;
-  int row_id = blockDim.y * gridDim.x + idy;
+  int row_id = blockDim.y * blockIdx.x + idy;
   if (row_id < height) {
     int src_idx = is_src_index ? index[row_id] : row_id;
     int dst_idx = is_src_index ? row_id : index[row_id];
@@ -72,7 +72,7 @@ void CopyMatrixRowsFunctor<T>::operator()(
   dim3 threads(128, 8);
   dim3 grids((height + threads.y - 1) / threads.y);
   CopyMatrixRowsKernel<T><<<grids, threads, 0, stream>>>(
-      src_data, dst_data, index_tensor_data, height, width, true);
+      src_data, dst_data, index_tensor_data, height, width, is_src_index);
   CUDA_POST_KERNEL_CHECK;
 }
 
diff --git a/lite/backends/cuda/math/sequence2batch.h b/lite/backends/cuda/math/sequence2batch.h
index 0df9600307c06c380adf731825065a7d7afdfcfc..e5a12ed0b4d54a9af47cfc046906ae96767e63cf 100644
--- a/lite/backends/cuda/math/sequence2batch.h
+++ b/lite/backends/cuda/math/sequence2batch.h
@@ -53,11 +53,11 @@ class LoDTensor2BatchFunctor {
   //            s0: 0 0 0 0, s1: 1 1 1 1 1, s2: 2 2 2
   //            seq_info[3] = {(4, 5, 1), (0, 4, 0), (9, 3, 2)}
   struct SeqInfo {
-    SeqInfo(size_t start, size_t length, size_t seq_idx)
-        : start_(start), length_(length), seq_idx_(seq_idx) {}
-    size_t start_;
-    size_t length_;
-    size_t seq_idx_;
+    SeqInfo(size_t start_val, size_t len_val, size_t seq_val)
+        : start(start_val), length(len_val), seq_idx(seq_val) {}
+    size_t start;
+    size_t length;
+    size_t seq_idx;
   };
 
  public:
@@ -76,7 +76,7 @@ class LoDTensor2BatchFunctor {
     }
 
     std::sort(seq_info.begin(), seq_info.end(), [](SeqInfo a, SeqInfo b) {
-      return a.length_ > b.length_;
+      return a.length > b.length;
     });
 
     // Calculate the start position of each batch.
@@ -106,7 +106,7 @@ class LoDTensor2BatchFunctor {
     batch_lods.emplace_back(std::vector<uint64_t>{0});
 
     // batch_lods[0] is the start positions for batch LoDTensor
-    size_t max_seqlen = seq_info[0].length_;
+    size_t max_seqlen = seq_info[0].length;
     batch_lods[0].resize(max_seqlen + 1);
     // batch_lods[1] is the raw index in the input LoDTensor
     batch_lods[1].resize(static_cast<size_t>(lod_tensor.dims()[0]));
@@ -119,8 +119,8 @@ class LoDTensor2BatchFunctor {
     for (size_t n = 0; n < max_seqlen; ++n) {
       size_t batch_id = batch_starts[n];
       for (size_t i = 0; i < seq_info.size(); ++i) {
-        size_t seq_len = seq_info[i].length_;
-        size_t start = seq_info[i].start_;
+        size_t seq_len = seq_info[i].length;
+        size_t start = seq_info[i].start;
         if (n < seq_len) {
           seq2batch_idx[batch_id] =
               is_reverse ? start + seq_len - 1 - n : start + n;
@@ -133,7 +133,7 @@ class LoDTensor2BatchFunctor {
     }
     auto* seq_order = batch_lods[2].data();
     for (size_t i = 0; i < seq_info.size(); ++i) {
-      seq_order[i] = seq_info[i].seq_idx_;
+      seq_order[i] = seq_info[i].seq_idx;
     }
 
     batch_tensor->set_lod(batch_lods);
diff --git a/lite/backends/cuda/math/sequence_padding.cu b/lite/backends/cuda/math/sequence_padding.cu
index 3a32be2a3446e420cac53a33506f141a001d61f0..e4f194b9c2289c51983d62b3835727efea91028d 100644
--- a/lite/backends/cuda/math/sequence_padding.cu
+++ b/lite/backends/cuda/math/sequence_padding.cu
@@ -86,8 +86,7 @@ void SequencePadding(T* pad_data,
       seq_num,
       pad_seq_len,
       step_width);
-  cudaError_t error = cudaGetLastError();
-  if (error != cudaSuccess) LOG(ERROR) << cudaGetErrorString(error);
+  CUDA_POST_KERNEL_CHECK;
 }
 
 template <typename T>
@@ -120,8 +119,7 @@ void SequenceUnpadding(T* seq_data,
       seq_num,
       pad_seq_len,
       step_width);
-  cudaError_t error = cudaGetLastError();
-  if (error != cudaSuccess) LOG(ERROR) << cudaGetErrorString(error);
+  CUDA_POST_KERNEL_CHECK;
 }
 
 template void SequencePadding(float* pad_data,
diff --git a/lite/kernels/cuda/assign_value_compute.cu b/lite/kernels/cuda/assign_value_compute.cu
index 89f2937f10399361951c3c8deb47e3700f93e288..6a2740101c2883b3b2f7c999bd96fd3fbd3ab3ce 100644
--- a/lite/kernels/cuda/assign_value_compute.cu
+++ b/lite/kernels/cuda/assign_value_compute.cu
@@ -68,7 +68,7 @@ void AssignValueCompute::Run() {
 
 REGISTER_LITE_KERNEL(assign_value,
                      kCUDA,
-                     kAny,
+                     kFloat,
                      kNCHW,
                      paddle::lite::kernels::cuda::AssignValueCompute,
                      def)
diff --git a/lite/kernels/cuda/dropout_compute.cc b/lite/kernels/cuda/dropout_compute.cc
index 7e3a3a62432f3bc5f2e62112b2b220abc17ee2bd..f9303a39cebda322526e6cc25401db35e1f4309b 100644
--- a/lite/kernels/cuda/dropout_compute.cc
+++ b/lite/kernels/cuda/dropout_compute.cc
@@ -23,6 +23,9 @@ namespace cuda {
 
 void DropoutCompute::Run() {
   auto& param = Param<operators::DropoutParam>();
+  auto& ctx = this->ctx_->template As<CUDAContext>();
+  auto stream = ctx.exec_stream();
+
   const float* x_data = param.x->data<float>();
   float* out_data = param.output->mutable_data<float>(TARGET(kCUDA));
   int num = param.x->dims().production();
@@ -31,7 +34,7 @@ void DropoutCompute::Run() {
   if (param.dropout_implementation == "downgrade_in_infer") {
     scale = 1.0f - prob_data;
   }
-  lite::cuda::math::scale(num, x_data, out_data, scale, 0);
+  lite::cuda::math::scale(num, x_data, out_data, scale, 0.f, stream);
 }
 
 }  // namespace cuda
diff --git a/lite/kernels/cuda/gru_compute.cu b/lite/kernels/cuda/gru_compute.cu
index 630d12f3e6012d826acdd1bb41efe0a0d85af1d7..ddca95048b303cce55cc3435b15f945a84fc8c0c 100644
--- a/lite/kernels/cuda/gru_compute.cu
+++ b/lite/kernels/cuda/gru_compute.cu
@@ -11,6 +11,8 @@
 // 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/cuda/gru_compute.h"
+
 #include <string>
 
 #include "lite/backends/cuda/cuda_utils.h"
@@ -19,7 +21,6 @@
 #include "lite/backends/cuda/math/sequence2batch.h"
 #include "lite/backends/cuda/target_wrapper.h"
 #include "lite/core/op_registry.h"
-#include "lite/kernels/cuda/gru_compute.h"
 
 namespace paddle {
 namespace lite {
@@ -133,7 +134,6 @@ struct GRUUnitFunctor {
                 value.gate_value,
                 context);
     }
-    CUDA_POST_KERNEL_CHECK;
 
     lite::cuda::math::GruForwardResetOutput<
         T><<<grids, threads, 0, context->exec_stream()>>>(
@@ -143,7 +143,7 @@ struct GRUUnitFunctor {
         frame_size,
         batch_size,
         active_gate,
-        batch_size == 1);
+        batch_size != 1);
     CUDA_POST_KERNEL_CHECK;
 
     if (value.prev_out_value) {
@@ -163,7 +163,6 @@ struct GRUUnitFunctor {
                 value.gate_value + frame_size * 2,
                 context);
     }
-    CUDA_POST_KERNEL_CHECK;
 
     lite::cuda::math::GruForwardFinalOutput<
         T><<<grids, threads, 0, context->exec_stream()>>>(value.gate_value,
@@ -173,7 +172,7 @@ struct GRUUnitFunctor {
                                                           batch_size,
                                                           active_node,
                                                           origin_mode,
-                                                          batch_size == 1);
+                                                          batch_size != 1);
     CUDA_POST_KERNEL_CHECK;
   }
 };
@@ -218,7 +217,6 @@ struct GRUUnitFunctor<half> {
                 value.gate_value,
                 context);
     }
-    CUDA_POST_KERNEL_CHECK;
 
     lite::cuda::math::GruForwardResetOutput<
         half><<<grids, threads, 0, context->exec_stream()>>>(
@@ -248,7 +246,6 @@ struct GRUUnitFunctor<half> {
                 value.gate_value + frame_size * 2,
                 context);
     }
-    CUDA_POST_KERNEL_CHECK;
 
     lite::cuda::math::GruForwardFinalOutput<
         half><<<grids, threads, 0, context->exec_stream()>>>(
diff --git a/lite/kernels/cuda/scale_compute.cc b/lite/kernels/cuda/scale_compute.cc
index 6bf7414d8c85383a834159678cdd5a09e0b434d9..9ce5905a7de750e1eed41e56784419c737e6d2d9 100644
--- a/lite/kernels/cuda/scale_compute.cc
+++ b/lite/kernels/cuda/scale_compute.cc
@@ -23,8 +23,11 @@ namespace cuda {
 
 void ScaleCompute::Run() {
   auto& param = Param<operators::ScaleParam>();
+  auto& ctx = this->ctx_->template As<CUDAContext>();
+  auto stream = ctx.exec_stream();
+
   const float* x_data = param.x->data<float>();
-  float* output_data = param.output->mutable_data<float>();
+  float* output_data = param.output->mutable_data<float>(TARGET(kCUDA));
   DDim x_dims = param.x->dims();
   bool bias_after_scale = param.bias_after_scale;
   float scale = param.scale;
@@ -33,7 +36,7 @@ void ScaleCompute::Run() {
     bias *= scale;
   }
   lite::cuda::math::scale(
-      x_dims.production(), x_data, output_data, scale, bias);
+      x_dims.production(), x_data, output_data, scale, bias, stream);
 }
 
 }  // namespace cuda
diff --git a/lite/kernels/cuda/sequence_mask_compute.cu b/lite/kernels/cuda/sequence_mask_compute.cu
index 8a8f292c103b8fb7b55940cf075d4b80b3fb328d..8e227a6a272127f500e10775f7ed4db53660e1f8 100644
--- a/lite/kernels/cuda/sequence_mask_compute.cu
+++ b/lite/kernels/cuda/sequence_mask_compute.cu
@@ -12,13 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "lite/kernels/cuda/sequence_mask_compute.h"
-
 #include <thrust/device_ptr.h>
+#include <thrust/functional.h>
 #include <thrust/reduce.h>
 
 #include "lite/backends/cuda/cuda_utils.h"
 #include "lite/core/op_registry.h"
+#include "lite/kernels/cuda/sequence_mask_compute.h"
 
 namespace paddle {
 namespace lite {
@@ -44,7 +44,7 @@ void SequenceMaskCompute<T, Ptype>::Run() {
   auto stream = ctx.exec_stream();
 
   const auto* x = param.X;
-  auto* x_data = x->template data<int64_t>();
+  const int64_t* x_data = x->template data<int64_t>();
   auto* y = param.Y;
   int maxlen = param.maxlen;
 
@@ -57,8 +57,11 @@ void SequenceMaskCompute<T, Ptype>::Run() {
   }
 
   if (maxlen < 0) {
-    maxlen = thrust::reduce(
-        x_data, x_data + x->numel(), 0, thrust::maximum<int64_t>());
+    maxlen = static_cast<int>(
+        thrust::reduce(thrust::device_pointer_cast(x_data),
+                       thrust::device_pointer_cast(x_data) + x->numel(),
+                       static_cast<int64_t>(0),
+                       thrust::maximum<int64_t>()));
   }
 
   auto y_dim = x->dims().Vectorize();
diff --git a/lite/kernels/cuda/sequence_pad_compute.cu b/lite/kernels/cuda/sequence_pad_compute.cu
index 1e304f00633794dcac5d8ebfcd9d79defb4980f7..8368eb3007e3f1d036420a5dc1c86204365e179c 100644
--- a/lite/kernels/cuda/sequence_pad_compute.cu
+++ b/lite/kernels/cuda/sequence_pad_compute.cu
@@ -32,9 +32,19 @@ void SequencePadCompute<T, Ptype>::Run() {
   const auto* pad_value = param.PadValue;
   auto* out = param.Out;
   auto* len_t = param.Length;
-  int padded_length = param.padded_length;
-
   int seq_num = x->lod()[0].size() - 1;
+  int padded_length;
+  if (param.padded_length == -1) {
+    int max_seq_len = 0;
+    for (int i = 0; i < seq_num; ++i) {
+      max_seq_len = std::max(
+          max_seq_len, static_cast<int>(x->lod()[0][i + 1] - x->lod()[0][i]));
+    }
+    padded_length = max_seq_len;
+  } else {
+    padded_length = param.padded_length;
+  }
+
   int max_seq_len = 0;
   int step_width = x->numel() / x->dims()[0];
 
diff --git a/lite/kernels/cuda/sequence_unpad_compute.cu b/lite/kernels/cuda/sequence_unpad_compute.cu
index bdedd74588884aa1e4b7f7c7ae3f414810b0826a..b4274e19a86d55a4e5e5099e984c537c2929bce7 100644
--- a/lite/kernels/cuda/sequence_unpad_compute.cu
+++ b/lite/kernels/cuda/sequence_unpad_compute.cu
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include <algorithm>
+
 #include "lite/backends/cuda/math/sequence_padding.h"
 #include "lite/core/op_registry.h"
 #include "lite/core/target_wrapper.h"
@@ -29,8 +30,39 @@ void SequenceUnpadCompute<T, Ptype>::Run() {
   auto& ctx = this->ctx_->template As<CUDAContext>();
   auto stream = ctx.exec_stream();
 
+  auto x_dims = param.X->dims();
+  auto len_dims = param.Length->dims();
+
+  auto* seq_len_ptr = param.Length->template data<int64_t>();
+  seq_len_cpu_.Resize(param.Length->dims());
+  TargetWrapperCuda::MemcpyAsync(seq_len_cpu_.mutable_data<int64_t>(),
+                                 seq_len_ptr,
+                                 sizeof(int64_t) * param.Length->numel(),
+                                 IoDirection::DtoH,
+                                 stream);
+  TargetWrapperCuda::StreamSync(stream);
+
+  int64_t batch_size = len_dims[0];
+  std::vector<uint64_t> out_lod0(batch_size + 1, 0);
+  for (int64_t i = 0; i < batch_size; ++i) {
+    out_lod0[i + 1] = out_lod0[i] + seq_len_cpu_.data<int64_t>()[i];
+  }
+  paddle::lite::LoD out_lod;
+  out_lod.push_back(out_lod0);
+
+  int64_t out_dim0 = out_lod0.back();
+  std::vector<int64_t> out_dims{out_dim0};
+  if (x_dims.size() == 2) {
+    out_dims.push_back(1);
+  } else {
+    for (size_t i = 2; i < x_dims.size(); ++i) {
+      out_dims.push_back(x_dims[i]);
+    }
+  }
+  param.Out->Resize(out_dims);
+  param.Out->set_lod(out_lod);
+
   const auto* pad_tensor = param.X;
-  const auto* len_t = param.Length;
   auto* seq_tensor = param.Out;
 
   int padded_length = pad_tensor->dims()[1];
diff --git a/lite/kernels/cuda/sequence_unpad_compute.h b/lite/kernels/cuda/sequence_unpad_compute.h
index f36520ea15c4ad504b2fd357d8729d6d0dbc2615..6b077a4dcbd91eb8f9a9e2cb1340088434f117aa 100644
--- a/lite/kernels/cuda/sequence_unpad_compute.h
+++ b/lite/kernels/cuda/sequence_unpad_compute.h
@@ -31,6 +31,7 @@ class SequenceUnpadCompute : public KernelLite<TARGET(kCUDA), Ptype> {
 
  private:
   lite::Tensor seq_offsets_;
+  lite::Tensor seq_len_cpu_;
   std::vector<size_t> seq_offsets_vec_;
 };
 
diff --git a/lite/kernels/cuda/var_conv_2d_compute.cu b/lite/kernels/cuda/var_conv_2d_compute.cu
index b847069879357ea600fd62b8f70d6c50e3c8c35f..b14073e5e1bfe074d355265726562579895dde86 100644
--- a/lite/kernels/cuda/var_conv_2d_compute.cu
+++ b/lite/kernels/cuda/var_conv_2d_compute.cu
@@ -184,6 +184,8 @@ using VarConvFp16 =
 REGISTER_LITE_KERNEL(var_conv_2d, kCUDA, kFloat, kNCHW, VarConvFp32, def)
     .BindInput("X", {LiteType::GetTensorTy(TARGET(kCUDA))})
     .BindInput("W", {LiteType::GetTensorTy(TARGET(kCUDA))})
+    .BindInput("COLUMN", {LiteType::GetTensorTy(TARGET(kCUDA))})
+    .BindInput("ROW", {LiteType::GetTensorTy(TARGET(kCUDA))})
     .BindOutput("Out", {LiteType::GetTensorTy(TARGET(kCUDA))})
     .BindOutput("Col", {LiteType::GetTensorTy(TARGET(kCUDA))})
     .Finalize();
@@ -191,6 +193,9 @@ REGISTER_LITE_KERNEL(var_conv_2d, kCUDA, kFloat, kNCHW, VarConvFp32, def)
 REGISTER_LITE_KERNEL(var_conv_2d, kCUDA, kFP16, kNCHW, VarConvFp16, def)
     .BindInput("X", {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
     .BindInput("W", {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
+    .BindInput("COLUMN",
+               {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
+    .BindInput("ROW", {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
     .BindOutput("Out", {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
     .BindOutput("Col", {LiteType::GetTensorTy(TARGET(kCUDA), PRECISION(kFP16))})
     .Finalize();
diff --git a/lite/operators/gru_op.cc b/lite/operators/gru_op.cc
index 862a1ff98f699393c9aa91afab978f947cc25187..0a9128dcd27870f6456b26ba636d4189267583be 100644
--- a/lite/operators/gru_op.cc
+++ b/lite/operators/gru_op.cc
@@ -75,9 +75,8 @@ bool GRUOpLite::AttachImpl(const cpp::OpDesc& op_desc, lite::Scope* scope) {
   auto batch_reset_hidden_prev = op_desc.Output("BatchResetHiddenPrev").front();
   auto batch_hidden = op_desc.Output("BatchHidden").front();
   auto hidden = op_desc.Output("Hidden").front();
-
   param_.input = scope->FindVar(input)->GetMutable<lite::Tensor>();
-  if (op_desc.Input("H0").size()) {
+  if (!op_desc.Input("H0").empty()) {
     auto h0 = op_desc.Input("H0").front();
     param_.h0 = scope->FindVar(h0)->GetMutable<lite::Tensor>();
   }
@@ -90,7 +89,7 @@ bool GRUOpLite::AttachImpl(const cpp::OpDesc& op_desc, lite::Scope* scope) {
       scope->FindVar(batch_hidden)->GetMutable<lite::Tensor>();
   param_.hidden = scope->FindVar(hidden)->GetMutable<lite::Tensor>();
 
-  if (op_desc.HasInput("Bias")) {
+  if (!op_desc.Input("Bias").empty()) {
     auto bias = op_desc.Input("Bias").front();
     param_.bias = scope->FindVar(bias)->GetMutable<lite::Tensor>();
   }
diff --git a/lite/operators/sequence_pad_op.cc b/lite/operators/sequence_pad_op.cc
index 687c4a1989deaa5afea2356338630fa0ee846cb5..858c0ffcbb1a8e739cf4575e9f2f8882fd231912 100644
--- a/lite/operators/sequence_pad_op.cc
+++ b/lite/operators/sequence_pad_op.cc
@@ -61,18 +61,19 @@ bool SequencePadOp::InferShapeImpl() const {
     max_seq_len =
         std::max(max_seq_len, static_cast<int>(x_lod_0[i + 1] - x_lod_0[i]));
   }
-  if (param_.padded_length == -1) {
-    param_.padded_length = max_seq_len;
+  int real_padded_length = param_.padded_length;
+  if (real_padded_length == -1) {
+    real_padded_length = max_seq_len;
   }
-  CHECK_GE(param_.padded_length, max_seq_len)
+  CHECK_GE(real_padded_length, max_seq_len)
       << "The SequencePadOp Attr(padded_length) should be greater than or "
          "equal to the length of the longest original sequence. But the "
          "padded_length we received is "
-      << param_.padded_length
+      << real_padded_length
       << ", the length of the longest original sequence is " << max_seq_len;
 
   int out_dim_0 = seq_num;
-  std::vector<int64_t> out_dims_vec{out_dim_0, param_.padded_length};
+  std::vector<int64_t> out_dims_vec{out_dim_0, real_padded_length};
   std::vector<int64_t> len_dims_vec{out_dim_0};
   auto time_step_dims_vec = time_step_dims.Vectorize();
   out_dims_vec.insert(
@@ -87,7 +88,7 @@ bool SequencePadOp::AttachImpl(const cpp::OpDesc &opdesc, lite::Scope *scope) {
       &scope->FindVar(opdesc.Input("X").front())->Get<lite::Tensor>());
   param_.PadValue = const_cast<lite::Tensor *>(
       &scope->FindVar(opdesc.Input("PadValue").front())->Get<lite::Tensor>());
-  param_.Length = scope->FindVar(opdesc.Input("Length").front())
+  param_.Length = scope->FindVar(opdesc.Output("Length").front())
                       ->GetMutable<lite::Tensor>();
   param_.Out =
       scope->FindVar(opdesc.Output("Out").front())->GetMutable<lite::Tensor>();
diff --git a/lite/operators/sequence_unpad_op.cc b/lite/operators/sequence_unpad_op.cc
index b91d43c741f002b2bdb30e161688cd40b462faee..4f4497f0b81b5710e71cd0a2fcce10e9559d9d30 100644
--- a/lite/operators/sequence_unpad_op.cc
+++ b/lite/operators/sequence_unpad_op.cc
@@ -32,32 +32,7 @@ bool SequenceUnpadOp::CheckShape() const {
   return true;
 }
 
-bool SequenceUnpadOp::InferShapeImpl() const {
-  auto x_dims = param_.X->dims();
-  auto len_dims = param_.Length->dims();
-
-  auto *seq_len_ptr = param_.Length->data<int64_t>();
-  int64_t batch_size = len_dims[0];
-  std::vector<uint64_t> out_lod0(batch_size + 1, 0);
-  for (int64_t i = 0; i < batch_size; ++i) {
-    out_lod0[i + 1] = out_lod0[i] + seq_len_ptr[i];
-  }
-  paddle::lite::LoD out_lod;
-  out_lod.push_back(out_lod0);
-
-  int64_t out_dim0 = out_lod0.back();
-  std::vector<int64_t> out_dims{out_dim0};
-  if (x_dims.size() == 2) {
-    out_dims.push_back(1);
-  } else {
-    for (size_t i = 2; i < x_dims.size(); ++i) {
-      out_dims.push_back(x_dims[i]);
-    }
-  }
-  param_.Out->Resize(out_dims);
-  param_.Out->set_lod(out_lod);
-  return true;
-}
+bool SequenceUnpadOp::InferShapeImpl() const { return true; }
 
 bool SequenceUnpadOp::AttachImpl(const cpp::OpDesc &opdesc,
                                  lite::Scope *scope) {
diff --git a/lite/operators/var_conv_2d_op.cc b/lite/operators/var_conv_2d_op.cc
index 83b6cc6a24ed1537adec8fd7d54a477edf91f873..612632acb4fbea692aa4a02dbd94bb1b506460bb 100644
--- a/lite/operators/var_conv_2d_op.cc
+++ b/lite/operators/var_conv_2d_op.cc
@@ -26,10 +26,16 @@ bool VarConv2dOp::InferShapeImpl() const { return true; }
 bool VarConv2dOp::AttachImpl(const cpp::OpDesc &opdesc, lite::Scope *scope) {
   param_.X = const_cast<lite::Tensor *>(
       &scope->FindVar(opdesc.Input("X").front())->Get<lite::Tensor>());
-  // param_.ROW = const_cast<lite::Tensor *>(
-  //     &scope->FindVar(opdesc.Input("ROW").front())->Get<lite::Tensor>());
-  // param_.COLUMN = const_cast<lite::Tensor *>(
-  //     &scope->FindVar(opdesc.Input("COLUMN").front())->Get<lite::Tensor>());
+  if (opdesc.HasInput("ROW") && !opdesc.Input("ROW").empty()) {
+    param_.ROW = const_cast<lite::Tensor *>(
+        &scope->FindVar(opdesc.Input("ROW").front())->Get<lite::Tensor>());
+    CHECK(param_.ROW) << "Input(ROW) of VarConv2dOP should not be null.";
+  }
+  if (opdesc.HasInput("COLUMN") && !opdesc.Input("COLUMN").empty()) {
+    param_.COLUMN = const_cast<lite::Tensor *>(
+        &scope->FindVar(opdesc.Input("COLUMN").front())->Get<lite::Tensor>());
+    CHECK(param_.COLUMN) << "Input(COLUMN) of VarConv2dOP should not be null.";
+  }
   param_.W = const_cast<lite::Tensor *>(
       &scope->FindVar(opdesc.Input("W").front())->Get<lite::Tensor>());
   param_.Out =
@@ -37,8 +43,6 @@ bool VarConv2dOp::AttachImpl(const cpp::OpDesc &opdesc, lite::Scope *scope) {
   param_.Col =
       scope->FindVar(opdesc.Output("Col").front())->GetMutable<lite::Tensor>();
   CHECK(param_.X) << "X(Input) of VarConv2dOP should not be null.";
-  // CHECK(param_.ROW) << "Input(ROW) of VarConv2dOP should not be null.";
-  // CHECK(param_.COLUMN) << "Input(COLUMN) of VarConv2dOP should not be null.";
   CHECK(param_.W) << "W(Input) of VarConv2dOP should not be null.";
   CHECK(param_.Out) << "Out(Output) of VarConv2dOP should not be null.";
   CHECK(param_.Col) << "Col(Output) of VarConv2dOP should not be null.";