diff --git a/x2paddle/optimizer/tf_optimizer.py b/x2paddle/optimizer/tf_optimizer.py
index 2111ee8bb6a58f7ee791448688d9a4a95b3aea86..fcf6cdfbbb8e4b44b163141b719201d06ff9a9ad 100644
--- a/x2paddle/optimizer/tf_optimizer.py
+++ b/x2paddle/optimizer/tf_optimizer.py
@@ -15,56 +15,8 @@
 # TODO useless node remove
 from x2paddle.decoder.tf_decoder import TFGraph
 
+# TODO bn merge
 
-class TFGraphOptimizer(object):
-    def __init__(self):
-        print("Doint Nothing")
+# TODO activation merge
 
-    def remove_isolated_node(self, graph):
-        # delete isolated nodes
-        isolated_nodes = list()
-        for node_name in graph.node_map.keys():
-            if len(graph.get_node(node_name).inputs) == 0 or len(
-                    graph.get_node(node_name).outputs) == 0:
-                isolated_nodes.append(node_name)
-
-        graph.remove_node(node_name)
-
-    def remove_identity_node(self, graph):
-        identity_node = list()
-        for node_name, node in graph.node_map.items():
-            if node.layer_type == "Identity":
-                identity_node.append(node_name)
-
-        for node_name in identity_node:
-            node = graph.get_node(node_name)
-            # Remind: Only 1 input for Identity node
-            input_node = graph.get_node(node.inputs[0])
-
-            # remove identity node from graph
-            idx = input_node.outputs.index(node_name)
-            del input_node.outputs[idx]
-
-            output_names = node.outputs
-            for output_name in output_names:
-                output_node = graph.get_node(output_name)
-                idx = output_node.inputs.index(node_name)
-                output_node.inputs[idx] = input_node.layer_name
-
-            idx = graph.topo_sort.index(node_name)
-            del graph.topo_sort[idx]
-
-    def run(self, graph):
-        self.remove_isolated_node(graph)
-        self.remove_identity_node(graph)
-
-
-# TODO identity node remove
-
-# TODO subgraph optimize
-
-# TODO compute optimize
-
-# activation merge
-
-# biasadd merge
+# TODO biasadd merge