diff --git a/x2paddle/decoder/tf_decoder.py b/x2paddle/decoder/tf_decoder.py
index 3509d5ee9d5399fa485916e38ad3eecc6edc227f..eb687ab3b9c1367d618d61bc32dd8f998a37d0de 100644
--- a/x2paddle/decoder/tf_decoder.py
+++ b/x2paddle/decoder/tf_decoder.py
@@ -130,7 +130,7 @@ class TFGraph(Graph):
     def __init__(self, model, data_format="NHWC"):
         super(TFGraph, self).__init__(model)
         self.identity_map = dict()
-        self.multi_out_ops = ['Split', 'SplitV', 'IteratorV2']
+        self.multi_out_ops = ['Split', 'SplitV', 'IteratorV2', 'Unpack']
         self.tf_data_format = data_format
         self.graph_name = "TFModel"
 
@@ -172,7 +172,8 @@ class TFGraph(Graph):
         self._remove_isolated_node()
         self._optimize_dialiation_conv()
         self._remove_identity_node()
-        self._remove_cast_node()
+#         self._remove_cast_node()
+        
 
     def get_node(self, node_name, copy=False):
         items = node_name.strip().split(':')
@@ -192,6 +193,8 @@ class TFGraph(Graph):
     
     def get_input_node(self, node, idx=0, copy=False):
         input_node_name = node.layer.input[idx]
+        if idx > 0:
+            copy = True
         return self.get_node(input_node_name, copy)
 
     def remove_node(self, node_name):
@@ -402,7 +405,7 @@ class TFDecoder(object):
                 right_shape_been_input = False
                 while not right_shape_been_input:
                     try:
-                        shape = input(
+                        shape = raw_input(
                             "Shape of Input(e.g. None,224,224,3): ")
                     except:
                         shape = input("Shape of Input(e.g. None,224,224,3): ")