diff --git a/mace/kernels/opencl/cl/pooling.cl b/mace/kernels/opencl/cl/pooling.cl
index b55202d330985629e5edb57f59fe0f7ac08f35d3..bd2763fc8c7eb68c06e09b4822ccc5025807a151 100644
--- a/mace/kernels/opencl/cl/pooling.cl
+++ b/mace/kernels/opencl/cl/pooling.cl
@@ -1,7 +1,7 @@
 #include <common.h>
 
 #ifdef FP16
-#define MIN_VALUE -HALF_MAX
+#define MIN_VALUE -USHRT_MAX
 #else
 #define MIN_VALUE -FLT_MAX
 #endif
diff --git a/mace/ops/pooling.cc b/mace/ops/pooling.cc
index dc058d71e85bcfdd286922fccd58e5d6fef8bc1f..17031378f7e93ac6924f794ec352d3009181179d 100644
--- a/mace/ops/pooling.cc
+++ b/mace/ops/pooling.cc
@@ -10,6 +10,10 @@ REGISTER_CPU_OPERATOR(OpKeyBuilder("Pooling")
                              .TypeConstraint<float>("T")
                              .Build(),
                       PoolingOp<DeviceType::CPU, float>);
+REGISTER_CPU_OPERATOR(OpKeyBuilder("Pooling")
+                          .TypeConstraint<half>("T")
+                          .Build(),
+                      PoolingOp<DeviceType::CPU, half>);
 
 #if __ARM_NEON
 REGISTER_NEON_OPERATOR(OpKeyBuilder("Pooling")
@@ -22,5 +26,9 @@ REGISTER_OPENCL_OPERATOR(OpKeyBuilder("Pooling")
                              .TypeConstraint<float>("T")
                              .Build(),
                          PoolingOp<DeviceType::OPENCL, float>);
+REGISTER_OPENCL_OPERATOR(OpKeyBuilder("Pooling")
+                             .TypeConstraint<half>("T")
+                             .Build(),
+                         PoolingOp<DeviceType::OPENCL, half>);
 
 }  //  namespace mace
diff --git a/mace/ops/pooling_test.cc b/mace/ops/pooling_test.cc
index c02c976fafb9bf75af7319828d56553814dd498e..dcda06b75483e6e0e01cfe16594991d72171d2bf 100644
--- a/mace/ops/pooling_test.cc
+++ b/mace/ops/pooling_test.cc
@@ -174,7 +174,7 @@ TEST_F(PoolingOpTest, OPENCLSimpleMaxPooling3S2) {
   SimpleMaxPooling3S2<OPENCL>();
 }
 
-template<DeviceType D>
+template<DeviceType D, typename T>
 static void MaxPooling3S2(const std::vector<index_t> &input_shape,
                           const std::vector<int> strides,
                           Padding padding) {
@@ -188,17 +188,18 @@ static void MaxPooling3S2(const std::vector<index_t> &input_shape,
       .AddIntsArg("strides", strides)
       .AddIntArg("padding", padding)
       .AddIntsArg("dilations", {1, 1})
+      .AddIntArg("T", static_cast<int>(DataTypeToEnum<T>::value))
       .Finalize(net.NewOperatorDef());
 
   // Add input data
-  net.AddRandomInput<D, float>("Input", input_shape);
+  net.AddRandomInput<D, T>("Input", input_shape);
 
   // run on cpu
   net.RunOp();
   Tensor expected;
   expected.Copy(*net.GetOutput("Output"));
 
-  BufferToImage<D, float>(net, "Input", "InputImage", kernels::BufferType::IN_OUT);
+  BufferToImage<D, T>(net, "Input", "InputImage", kernels::BufferType::IN_OUT);
   OpDefBuilder("Pooling", "PoolingTest")
       .Input("InputImage")
       .Output("OutputImage")
@@ -207,11 +208,12 @@ static void MaxPooling3S2(const std::vector<index_t> &input_shape,
       .AddIntsArg("strides", strides)
       .AddIntArg("padding", padding)
       .AddIntsArg("dilations", {1, 1})
+      .AddIntArg("T", static_cast<int>(DataTypeToEnum<T>::value))
       .Finalize(net.NewOperatorDef());
   net.RunOp(D);
-  ImageToBuffer<D, float>(net, "OutputImage", "OPENCLOutput", kernels::BufferType::IN_OUT);
+  ImageToBuffer<D, T>(net, "OutputImage", "OPENCLOutput", kernels::BufferType::IN_OUT);
 
-  ExpectTensorNear<float>(expected, *net.GetOutput("OPENCLOutput"), 0.001);
+  ExpectTensorNear<T>(expected, *net.GetOutput("OPENCLOutput"), 0.001);
 }
 
 // TODO(chenghui) : there is a bug.
@@ -221,17 +223,24 @@ static void MaxPooling3S2(const std::vector<index_t> &input_shape,
 //}
 
 TEST_F(PoolingOpTest, OPENCLAlignedMaxPooling3S2) {
-  MaxPooling3S2<OPENCL>({3, 64, 32, 32}, {1, 1}, Padding::VALID);
-  MaxPooling3S2<OPENCL>({3, 64, 32, 32}, {2, 2}, Padding::VALID);
-  MaxPooling3S2<OPENCL>({3, 64, 32, 32}, {1, 1}, Padding::SAME);
-  MaxPooling3S2<OPENCL>({3, 64, 32, 32}, {2, 2}, Padding::SAME);
+  MaxPooling3S2<OPENCL, float>({3, 64, 32, 32}, {1, 1}, Padding::VALID);
+  MaxPooling3S2<OPENCL, float>({3, 64, 32, 32}, {2, 2}, Padding::VALID);
+  MaxPooling3S2<OPENCL, float>({3, 64, 32, 32}, {1, 1}, Padding::SAME);
+  MaxPooling3S2<OPENCL, float>({3, 64, 32, 32}, {2, 2}, Padding::SAME);
+}
+
+TEST_F(PoolingOpTest, OPENCLHalfAlignedMaxPooling3S2) {
+  MaxPooling3S2<OPENCL, half>({3, 64, 32, 32}, {1, 1}, Padding::VALID);
+  MaxPooling3S2<OPENCL, half>({3, 64, 32, 32}, {2, 2}, Padding::VALID);
+  MaxPooling3S2<OPENCL, half>({3, 64, 32, 32}, {1, 1}, Padding::SAME);
+  MaxPooling3S2<OPENCL, half>({3, 64, 32, 32}, {2, 2}, Padding::SAME);
 }
 
 TEST_F(PoolingOpTest, OPENCLUnalignedMaxPooling3S2) {
-  MaxPooling3S2<OPENCL>({3, 41, 43, 47}, {1, 1}, Padding::VALID);
-  MaxPooling3S2<OPENCL>({3, 41, 43, 47}, {2, 2}, Padding::VALID);
-  MaxPooling3S2<OPENCL>({3, 41, 43, 47}, {1, 1}, Padding::SAME);
-  MaxPooling3S2<OPENCL>({3, 41, 43, 47}, {2, 2}, Padding::SAME);
+  MaxPooling3S2<OPENCL, half>({3, 41, 43, 47}, {1, 1}, Padding::VALID);
+  MaxPooling3S2<OPENCL, half>({3, 41, 43, 47}, {2, 2}, Padding::VALID);
+  MaxPooling3S2<OPENCL, half>({3, 41, 43, 47}, {1, 1}, Padding::SAME);
+  MaxPooling3S2<OPENCL, half>({3, 41, 43, 47}, {2, 2}, Padding::SAME);
 }
 
 TEST_F(PoolingOpTest, AVG_VALID) {
@@ -297,7 +306,7 @@ TEST_F(PoolingOpTest, OPENCLSimpleAvgPooling) {
   SimpleAvgPoolingTest<OPENCL>();
 }
 
-template<DeviceType D>
+template<DeviceType D, typename T>
 static void AvgPoolingTest(const std::vector<index_t> &shape,
                                   const std::vector<int> &kernels,
                                   const std::vector<int> &strides,
@@ -322,7 +331,7 @@ static void AvgPoolingTest(const std::vector<index_t> &shape,
   Tensor expected;
   expected.Copy(*net.GetOutput("Output"));
 
-  BufferToImage<D, float>(net, "Input", "InputImage", kernels::BufferType::IN_OUT);
+  BufferToImage<D, T>(net, "Input", "InputImage", kernels::BufferType::IN_OUT);
   OpDefBuilder("Pooling", "PoolingTest")
       .Input("InputImage")
       .Output("OutputImage")
@@ -331,30 +340,41 @@ static void AvgPoolingTest(const std::vector<index_t> &shape,
       .AddIntsArg("strides", strides)
       .AddIntArg("padding", padding)
       .AddIntsArg("dilations", {1, 1})
+      .AddIntArg("T", static_cast<int>(DataTypeToEnum<T>::value))
       .Finalize(net.NewOperatorDef());
   net.RunOp(D);
-  ImageToBuffer<D, float>(net, "OutputImage", "OPENCLOutput", kernels::BufferType::IN_OUT);
+  ImageToBuffer<D, T>(net, "OutputImage", "OPENCLOutput", kernels::BufferType::IN_OUT);
 
-  ExpectTensorNear<float>(expected, *net.GetOutput("OPENCLOutput"), 0.001);
+  ExpectTensorNear<float, T>(expected, *net.GetOutput("OPENCLOutput"), 0.01);
 }
 
 TEST_F(PoolingOpTest, OPENCLAlignedAvgPooling) {
-  AvgPoolingTest<OPENCL>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::VALID);
-  AvgPoolingTest<OPENCL>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::SAME);
+  AvgPoolingTest<OPENCL, float>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::VALID);
+  AvgPoolingTest<OPENCL, float>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::SAME);
+}
+
+TEST_F(PoolingOpTest, OPENCLHalfAlignedAvgPooling) {
+  AvgPoolingTest<OPENCL, half>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::VALID);
+  AvgPoolingTest<OPENCL, half>({3, 15, 15, 128}, {4, 4}, {4, 4}, Padding::SAME);
 }
 
 TEST_F(PoolingOpTest, OPENCLAlignedLargeKernelAvgPooling) {
-  AvgPoolingTest<OPENCL>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::VALID);
-  AvgPoolingTest<OPENCL>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::SAME);
+  AvgPoolingTest<OPENCL, float>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::VALID);
+  AvgPoolingTest<OPENCL, float>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::SAME);
+}
+
+TEST_F(PoolingOpTest, OPENCLHalfAlignedLargeKernelAvgPooling) {
+  AvgPoolingTest<OPENCL, half>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::VALID);
+  AvgPoolingTest<OPENCL, half>({3, 64, 64, 128}, {16, 16}, {16, 16}, Padding::SAME);
 }
 
 TEST_F(PoolingOpTest, OPENCLUnAlignedAvgPooling) {
-  AvgPoolingTest<OPENCL>({3, 31, 37, 128}, {2, 2}, {2, 2}, Padding::VALID);
-  AvgPoolingTest<OPENCL>({3, 31, 37, 128}, {2, 2}, {2, 2}, Padding::SAME);
+  AvgPoolingTest<OPENCL, float>({3, 31, 37, 128}, {2, 2}, {2, 2}, Padding::VALID);
+  AvgPoolingTest<OPENCL, float>({3, 31, 37, 128}, {2, 2}, {2, 2}, Padding::SAME);
 }
 
 TEST_F(PoolingOpTest, OPENCLUnAlignedLargeKernelAvgPooling) {
-  AvgPoolingTest<OPENCL>({3, 31, 37, 128}, {8, 8}, {8, 8}, Padding::VALID);
-  AvgPoolingTest<OPENCL>({3, 31, 37, 128}, {8, 8}, {8, 8}, Padding::SAME);
+  AvgPoolingTest<OPENCL, float>({3, 31, 37, 128}, {8, 8}, {8, 8}, Padding::VALID);
+  AvgPoolingTest<OPENCL, float>({3, 31, 37, 128}, {8, 8}, {8, 8}, Padding::SAME);
 }