diff --git a/metal/paddle-mobile/paddle-mobile/Executor.swift b/metal/paddle-mobile/paddle-mobile/Executor.swift
index 303e35bf73d5c90dc6311aa29b25e77b47ba053b..0f3b8824ad77de379ee575546a3e262ceb7833bb 100644
--- a/metal/paddle-mobile/paddle-mobile/Executor.swift
+++ b/metal/paddle-mobile/paddle-mobile/Executor.swift
@@ -14,7 +14,7 @@
 
 import Foundation
 
-let testTo = 10
+let testTo = 7
 
 public class ResultHolder<P: PrecisionType> {
   public let dim: [Int]
diff --git a/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/PreluKernel.metal b/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/PreluKernel.metal
index f07b636052f823bd11e0aaa3f6be6ae17d8ca804..1c5b08ee7eeaaa4fd2a8b5064a6af66c77596120 100644
--- a/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/PreluKernel.metal
+++ b/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/PreluKernel.metal
@@ -28,16 +28,16 @@ kernel void prelu_channel(texture2d_array<float, access::sample> inTexture [[tex
   }
   
   constexpr sampler sample(coord::pixel, filter::nearest, address::clamp_to_zero);
-  float4 input = inTexture.sample(sample, gid.x, gid.y, gid.z);
+  float4 input = inTexture.sample(sample, float2(gid.x, gid.y), gid.z);
+  float4 alpha_value = alpha[gid.z];
   float4 output;
-  output.x = input.x > 0 ? input.x : alpha[gid.z].x;
-  output.x = input.y > 0 ? input.y : alpha[gid.z].y;
-  output.x = input.z > 0 ? input.z : alpha[gid.z].z;
-  output.x = input.w > 0 ? input.w : alpha[gid.z].w;
+  output.x = input.x > 0 ? input.x : (alpha_value.x * input.x);
+  output.y = input.y > 0 ? input.y : (alpha_value.y * input.y);
+  output.z = input.z > 0 ? input.z : (alpha_value.z * input.z);
+  output.w = input.w > 0 ? input.w : (alpha_value.w * input.w);
   outTexture.write(output, gid.xy, gid.z);
 }
 
-
 kernel void prelu_element(texture2d_array<float, access::sample> inTexture [[texture(0)]],
                           texture2d_array<float, access::write> outTexture [[texture(1)]],
                           const device float4 *alpha [[buffer(0)]],
@@ -49,19 +49,19 @@ kernel void prelu_element(texture2d_array<float, access::sample> inTexture [[tex
   }
   
   constexpr sampler sample(coord::pixel, filter::nearest, address::clamp_to_zero);
-  float4 input = inTexture.sample(sample, gid.x, gid.y, gid.z);
-  
+  float4 input = inTexture.sample(sample, float2(gid.x, gid.y), gid.z);
+
   int alpha_to = (gid.y * inTexture.get_width() + gid.x) * inTexture.get_array_size();
-  
+  float4 alpha_value = alpha[alpha_to + gid.z];
+
   float4 output;
-  output.x = input.x > 0 ? input.x : alpha[alpha_to + gid.z].x;
-  output.x = input.y > 0 ? input.y : alpha[alpha_to + gid.z].y;
-  output.x = input.z > 0 ? input.z : alpha[alpha_to + gid.z].z;
-  output.x = input.w > 0 ? input.w : alpha[alpha_to + gid.z].w;
+  output.x = input.x > 0 ? input.x : (alpha_value.x * input.x);
+  output.y = input.y > 0 ? input.y : (alpha_value.y * input.y);
+  output.z = input.z > 0 ? input.z : (alpha_value.z * input.z);
+  output.w = input.w > 0 ? input.w : (alpha_value.w * input.w);
   outTexture.write(output, gid.xy, gid.z);
 }
 
-
 kernel void prelu_other(texture2d_array<float, access::sample> inTexture [[texture(0)]],
                           texture2d_array<float, access::write> outTexture [[texture(1)]],
                           const device float *alpha [[buffer(0)]],
@@ -73,12 +73,12 @@ kernel void prelu_other(texture2d_array<float, access::sample> inTexture [[textu
   }
   
   constexpr sampler sample(coord::pixel, filter::nearest, address::clamp_to_zero);
-  float4 input = inTexture.sample(sample, gid.x, gid.y, gid.z);
-  
+  float4 input = inTexture.sample(sample, float2(gid.x, gid.y), gid.z);
+  float alpha_value = alpha[0];
   float4 output;
-  output.x = input.x > 0 ? input.x : alpha[0];
-  output.x = input.y > 0 ? input.y : alpha[0];
-  output.x = input.z > 0 ? input.z : alpha[0];
-  output.x = input.w > 0 ? input.w : alpha[0];
+  output.x = input.x > 0 ? input.x : (alpha_value * input.x);
+  output.y = input.y > 0 ? input.y : (alpha_value * input.y);
+  output.z = input.z > 0 ? input.z : (alpha_value * input.z);
+  output.w = input.w > 0 ? input.w : (alpha_value * input.w);
   outTexture.write(output, gid.xy, gid.z);
 }
diff --git a/metal/paddle-mobile/paddle-mobile/Operators/PreluOp.swift b/metal/paddle-mobile/paddle-mobile/Operators/PreluOp.swift
index ec1437a3c2f084dbfa0e4922a305db7bd40b5b8f..10b5816d7b4528572cdc6b84d53b73499dde93b4 100644
--- a/metal/paddle-mobile/paddle-mobile/Operators/PreluOp.swift
+++ b/metal/paddle-mobile/paddle-mobile/Operators/PreluOp.swift
@@ -50,8 +50,17 @@ class PreluOp<P: PrecisionType>: Operator<PreluKernel<P>, PreluParam<P>>, Runabl
   }
   
   func delogOutput() {
+    print(" \(type) input: ")
+    print(para.input.metalTexture.toTensor(dim: (n: para.input.originDim[0], c: para.input.originDim[1], h: para.input.originDim[2], w: para.input.originDim[3])).strideArray())
+    
+    print(" \(type) Alpha: ")
+    let _: Float32? = para.alpha.buffer.logDesc(header: " alpha: ", stridable: false)
+    
+    print(" \(type) output: ")
+    print(para.output.metalTexture.toTensor(dim: (n: para.output.originDim[0], c: para.output.originDim[1], h: para.output.originDim[2], w: para.output.originDim[3])).strideArray())
+  }
+  
 //    print("softmax delog")
 //    let _: P? = para.input.metalTexture.logDesc(header: "softmax input: ", stridable: false)
 //    let _: P? = para.output.metalTexture.logDesc(header: "softmax output: ", stridable: false)
-  }
 }