diff --git a/python/paddle/trainer/config_parser.py b/python/paddle/trainer/config_parser.py
index ab416ff2e3c18b445c382ef8addebd8122f3324c..32ef7ca4860598ff4dc095b523fdbe33801e62dc 100644
--- a/python/paddle/trainer/config_parser.py
+++ b/python/paddle/trainer/config_parser.py
@@ -874,7 +874,7 @@ class Conv(Cfg):
                  filter_size_y=None,
                  padding_y=None,
                  stride_y=None,
-                 dilation=1,
+                 dilation=None,
                  dilation_y=None):
         self.add_keys(locals())
         if filter_size_y is None:
@@ -1388,8 +1388,12 @@ def parse_conv(conv, input_layer_name, conv_conf, num_filters, trans=False):
     conv_conf.stride_y = conv.stride_y
     conv_conf.groups = conv.groups
     conv_conf.caffe_mode = conv.caffe_mode
-    conv_conf.dilation = conv.dilation
-    conv_conf.dilation_y = conv.dilation_y
+    if not conv.dilation:
+        conv.dilation = 1
+        conv.dilation_y = 1
+    else:
+        conv_conf.dilation = conv.dilation
+        conv_conf.dilation_y = conv.dilation_y
 
     if not trans:
         conv_conf.filter_channels = conv.channels / conv.groups
@@ -1397,20 +1401,20 @@ def parse_conv(conv, input_layer_name, conv_conf, num_filters, trans=False):
             get_img_size(input_layer_name, conv.channels)
         conv_conf.output_x = cnn_output_size(
             conv_conf.img_size, conv_conf.filter_size, conv_conf.padding,
-            conv_conf.stride, conv_conf.caffe_mode, conv_conf.dilation)
+            conv_conf.stride, conv_conf.caffe_mode, conv.dilation)
         conv_conf.output_y = cnn_output_size(
             conv_conf.img_size_y, conv_conf.filter_size_y, conv_conf.padding_y,
-            conv_conf.stride_y, conv_conf.caffe_mode, conv_conf.dilation_y)
+            conv_conf.stride_y, conv_conf.caffe_mode, conv.dilation_y)
     else:
         conv_conf.filter_channels = num_filters / conv.groups
         conv_conf.output_x, conv_conf.output_y = \
             get_img_size(input_layer_name, conv.channels)
         conv_conf.img_size = cnn_image_size(
             conv_conf.output_x, conv_conf.filter_size, conv_conf.padding,
-            conv_conf.stride, conv_conf.caffe_mode, conv_conf.dilation)
+            conv_conf.stride, conv_conf.caffe_mode, conv.dilation)
         conv_conf.img_size_y = cnn_image_size(
             conv_conf.output_y, conv_conf.filter_size_y, conv_conf.padding_y,
-            conv_conf.stride_y, conv_conf.caffe_mode, conv_conf.dilation_y)
+            conv_conf.stride_y, conv_conf.caffe_mode, conv.dilation_y)
 
 
 #caffe_mode: compute the output size using floor instead of ceil,
diff --git a/python/paddle/trainer_config_helpers/layers.py b/python/paddle/trainer_config_helpers/layers.py
index cc1b34df9e7cf8d17bafeb57624548de017066e9..00b35f4372ffd01c19b1bffa8c0e9e347eac159e 100644
--- a/python/paddle/trainer_config_helpers/layers.py
+++ b/python/paddle/trainer_config_helpers/layers.py
@@ -2523,7 +2523,9 @@ def img_conv_layer(input,
 
     if layer_type:
         if dilation > 1 or dilation_y > 1:
-            assert layer_type in ["cudnn_conv", "cudnn_convt"]
+            assert layer_type in [
+                "cudnn_conv", "cudnn_convt", "exconv", "exconvt"
+            ]
         if trans:
             assert layer_type in ["exconvt", "cudnn_convt"]
         else:
diff --git a/python/paddle/trainer_config_helpers/tests/configs/protostr/img_layers.protostr b/python/paddle/trainer_config_helpers/tests/configs/protostr/img_layers.protostr
index 5ddf6052df021b055390a42c25ce6c0d650e4aee..b14121e82cb7d9516c4771fc896b9b3b9e01d1c8 100644
--- a/python/paddle/trainer_config_helpers/tests/configs/protostr/img_layers.protostr
+++ b/python/paddle/trainer_config_helpers/tests/configs/protostr/img_layers.protostr
@@ -28,6 +28,8 @@ layers {
       stride_y: 1
       output_y: 227
       img_size_y: 256
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_0__.wbias"
diff --git a/python/paddle/trainer_config_helpers/tests/configs/protostr/img_trans_layers.protostr b/python/paddle/trainer_config_helpers/tests/configs/protostr/img_trans_layers.protostr
index c0252b945b4c7fd6b4dad8770e3e1dccb88df28a..c7a487a11231cba6182b654108773037bdb0ec35 100644
--- a/python/paddle/trainer_config_helpers/tests/configs/protostr/img_trans_layers.protostr
+++ b/python/paddle/trainer_config_helpers/tests/configs/protostr/img_trans_layers.protostr
@@ -28,6 +28,8 @@ layers {
       stride_y: 1
       output_y: 227
       img_size_y: 256
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_0__.wbias"
diff --git a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_bilinear_interp.protostr b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_bilinear_interp.protostr
index fd5224ca55cd1f642ca2f927f867a7cbf8a47cf6..25ec6323751fae5778657945a765d8ca162ee2c4 100644
--- a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_bilinear_interp.protostr
+++ b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_bilinear_interp.protostr
@@ -28,6 +28,8 @@ layers {
       stride_y: 1
       output_y: 48
       img_size_y: 48
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_0__.wbias"
diff --git a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_maxout.protostr b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_maxout.protostr
index 03f4f3a31d6c222d949f64341bb8ac4c2a56fc5a..39dc4871469785fbe667e43f1f0fb9da7a19e2d2 100644
--- a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_maxout.protostr
+++ b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_maxout.protostr
@@ -30,6 +30,8 @@ layers {
       stride_y: 1
       output_y: 48
       img_size_y: 48
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_0__.wbias"
@@ -105,6 +107,8 @@ layers {
       stride_y: 1
       output_y: 24
       img_size_y: 24
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_1__.wbias"
diff --git a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_pad.protostr b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_pad.protostr
index 15c6ab4dc8e61dedc10acaa49db7d8ae136d4952..d5d6d31a17b84d8ddb4e555caca804f2f6c50992 100644
--- a/python/paddle/trainer_config_helpers/tests/configs/protostr/test_pad.protostr
+++ b/python/paddle/trainer_config_helpers/tests/configs/protostr/test_pad.protostr
@@ -30,6 +30,8 @@ layers {
       stride_y: 1
       output_y: 48
       img_size_y: 48
+      dilation: 1
+      dilation_y: 1
     }
   }
   bias_parameter_name: "___conv_0__.wbias"