diff --git a/source/backend/metal/MNNMetalContext.h b/source/backend/metal/MNNMetalContext.h
index 7417a02a..2dc55e27 100644
--- a/source/backend/metal/MNNMetalContext.h
+++ b/source/backend/metal/MNNMetalContext.h
@@ -121,6 +121,7 @@ typedef struct {
                 threads:(MTLSize)threads
         threadsPerGroup:(MTLSize)threadsPerGroup
               bandwidth:(MNN::MetalBandwidth)bandwidth;
+- (id<MTLComputePipelineState>)pipelineWithName:(NSString *)name;
 
 #if MNN_METAL_DEBUG
 /**
@@ -147,6 +148,8 @@ typedef struct {
  * @brief print encoder
  */
 - (void)printEncoder:(id<MTLCommandEncoder>)encoder;
+
+
 #endif
 @end
 
diff --git a/source/backend/metal/MetalPooling.hpp b/source/backend/metal/MetalPooling.hpp
index cc1697f6..04f009da 100644
--- a/source/backend/metal/MetalPooling.hpp
+++ b/source/backend/metal/MetalPooling.hpp
@@ -33,6 +33,9 @@ private:
     int mPadX;
     int mPadY;
     id<MTLBuffer> mConstBuffer;
+    MTLSize mGroup;
+    MTLSize mLocal;
+    id<MTLComputePipelineState> mPipeline;
 };
 
 } // namespace MNN
diff --git a/source/backend/metal/MetalPooling.mm b/source/backend/metal/MetalPooling.mm
index 47cba0f9..29dd08d2 100755
--- a/source/backend/metal/MetalPooling.mm
+++ b/source/backend/metal/MetalPooling.mm
@@ -59,7 +59,10 @@ ErrorCode MetalPooling::onResize(const std::vector<Tensor *> &inputs, const std:
     ((int *)mConstBuffer.contents)[8]  = strideHeight;
     ((int *)mConstBuffer.contents)[9]  = padWidth;
     ((int *)mConstBuffer.contents)[10] = padHeight;
-
+    auto ow = output->width(), oh = output->height(), slice = UP_DIV(output->channel(), 4) * output->batch();
+    mLocal = MTLSizeMake(8, 8, 4);
+    mGroup = MTLSizeMake(UP_DIV(ow, 8), (NSUInteger)UP_DIV(oh, 8), (NSUInteger)UP_DIV(slice, 4));
+    mPipeline = [context pipelineWithName:(mPoolType == PoolType_MAXPOOL) ? @"pooling_max" : @"pooling_avg"];
     return NO_ERROR;
 }
 
@@ -67,17 +70,12 @@ ErrorCode MetalPooling::onExecute(const std::vector<Tensor *> &inputs, const std
     auto backend = static_cast<MetalBackend *>(this->backend());
     auto context = (__bridge MNNMetalContext *)backend->context();
     auto input = inputs[0], output = outputs[0];
-    auto ow = output->width(), oh = output->height(), slice = UP_DIV(output->channel(), 4) * output->batch();
-
     auto encoder   = [context encoder];
-    auto bandwidth = [context load:(mPoolType == PoolType_MAXPOOL) ? @"pooling_max" : @"pooling_avg" encoder:encoder];
-    bandwidth.zAxisProtected = YES;
+    [encoder setComputePipelineState:mPipeline];
     [encoder setBuffer:(__bridge id<MTLBuffer>)(void *)input->deviceId() offset:0 atIndex:0];
     [encoder setBuffer:(__bridge id<MTLBuffer>)(void *)output->deviceId() offset:0 atIndex:1];
     [encoder setBuffer:mConstBuffer offset:0 atIndex:2];
-    [context dispatchEncoder:encoder
-                     threads:{ (NSUInteger) ow, (NSUInteger)oh, (NSUInteger)slice }
-                   bandwidth:bandwidth];
+    [encoder dispatchThreadgroups:mGroup threadsPerThreadgroup:mLocal];
     [encoder endEncoding];
     MNN_PRINT_ENCODER(context, encoder);
     return NO_ERROR;