diff --git a/x2paddle/decoder/tf_decoder.py b/x2paddle/decoder/tf_decoder.py
index f23fc32b2ed812e4a3adf9a5c506a8137f7f4cd0..e55f5c05b4a36d54d26cac3aadc034ec5b347b3b 100644
--- a/x2paddle/decoder/tf_decoder.py
+++ b/x2paddle/decoder/tf_decoder.py
@@ -72,6 +72,15 @@ class TFGraphNode(GraphNode):
                 dtype, self.layer.name))
         return self.dtype_map[dtype]
 
+    def set_dtype(self, dtype):
+        dtype_idx = 0
+        for k, v in self.dtype_map.items():
+            if v == dtype:
+                dtype_idx = k
+        if dtype_idx == 0:
+            raise Exception("Cannot set dtype of node to '{}'".format(dtype))
+        self.layer.attr['dtype'].type = dtype_idx
+
     @property
     def raw_dtype(self):
         keys = ['dtype', 'Tidx', 'T', 'DstT']
diff --git a/x2paddle/op_mapper/tf_op_mapper.py b/x2paddle/op_mapper/tf_op_mapper.py
index 541ee3c845d78df5e0ec20763b6e9b7d92b6791e..e94428386a83199462682b8c7943669b9837742f 100644
--- a/x2paddle/op_mapper/tf_op_mapper.py
+++ b/x2paddle/op_mapper/tf_op_mapper.py
@@ -1133,18 +1133,26 @@ class TFOpMapper(OpMapper):
         inputs = dict()
         attr = dict()
 
+        dtype = 'int32'
+        if start.dtype.startswith('float'):
+            dtype = start.dtype
         if start.layer_type == "Const":
             attr["start"] = start.value
         else:
             inputs["start"] = start.name
+        if limit.dtype.startswith('float'):
+            dtype = limit.dtype
         if limit.layer_type == "Const":
             attr["end"] = limit.value
         else:
             inputs["end"] = limit.name
+        if delta.dtype.startswith('float'):
+            dtype = delta.dtype
         if delta.layer_type == "Const":
             attr["step"] = delta.value
         else:
             inputs["step"] = delta.name
+        node.set_dtype(dtype)
         attr["dtype"] = string(node.dtype)
 
         program.add_layer(