diff --git a/python/paddle/trainer/config_parser.py b/python/paddle/trainer/config_parser.py
index 4ce01e005ae3ca549bb39c149e4ebf3cb04f8c1c..79b85214228f30e564b2548521edc63f78208f61 100644
--- a/python/paddle/trainer/config_parser.py
+++ b/python/paddle/trainer/config_parser.py
@@ -636,7 +636,6 @@ class Operator(Cfg):
             input_layer_names,
             ):
         self.add_keys(locals())
-
         self.operator_conf = OperatorConfig()
         self.operator_conf.type = self.type
 
@@ -686,12 +685,15 @@ class ConvOperator(Operator):
         if num_filters is not None:
             self.operator_conf.num_filters = num_filters
 
-        parse_conv(conv_conf, input_layer_names[0], self.operator_conf.conv_conf, True)
+        parse_conv(conv_conf,
+                   MakeLayerNameInSubmodel(input_layer_names[0]),
+                   self.operator_conf.conv_conf)
         self.operator_conf.output_size = (self.operator_conf.conv_conf.output_x  ** 2) * num_filters
 
         config_assert(len(input_layer_names) == 2, "Conv is binary operator")
 
-
+    def calc_output_size(self, input_sizes):
+        return self.operator_conf.output_size
 
 
 # please refer to the comments in proto/ModelConfig.proto
diff --git a/python/paddle/trainer_config_helpers/layers.py b/python/paddle/trainer_config_helpers/layers.py
index fab7e6e091863fdad6d81f4c63f12132c2be5161..a5bacaf0792785d9dc1ed17186002e41ea8584d0 100644
--- a/python/paddle/trainer_config_helpers/layers.py
+++ b/python/paddle/trainer_config_helpers/layers.py
@@ -2668,7 +2668,7 @@ def classification_cost(input, label, name=None,
     return LayerOutput(name, LayerType.COST, parents=[input, label])
 
 def conv_operator(input, filter_size, num_filters,
-                  num_channel=None, stride=1, padding=0,
+                  num_channel=None, stride=1, padding=0, groups=1,
                   filter_size_y=None, stride_y=None, padding_y=None):
     """
     Different from img_conv_layer, conv_op is an Operator, which can be used
@@ -2715,7 +2715,7 @@ def conv_operator(input, filter_size, num_filters,
         stride_y = stride
     if padding_y is None:
         padding_y = padding
-    op = ConvOperator(input_layer_name=[x.name for x in input],
+    op = ConvOperator(input_layer_names=[x.name for x in input],
                       num_filters = num_filter,
                       conv_conf=Conv(filter_size=filter_size,
                                      padding=padding,
@@ -2723,7 +2723,8 @@ def conv_operator(input, filter_size, num_filters,
                                      channels=num_channel,
                                      filter_size_y=filter_size_y,
                                      padding_y=padding_y,
-                                     stride_y=stride_y))
+                                     stride_y=stride_y,
+                                     groups=groups))
     op.origin = input
     op.origin.operator = "conv_op"
     return op