diff --git a/onnx_modifier.py b/onnx_modifier.py
index 20228c1..c362cf2 100644
--- a/onnx_modifier.py
+++ b/onnx_modifier.py
@@ -52,9 +52,9 @@ class onnxModifier:
         # print(self.node_name2module.keys())
         
         # initializer name => initializer
-        self.initilizer_name2module = dict()
+        self.initializer_name2module = dict()
         for initializer in self.initializer:
-            self.initilizer_name2module[initializer.name] = initializer
+            self.initializer_name2module[initializer.name] = initializer
                    
     def remove_node_by_name(self, node_name):
         # remove node in graph
@@ -82,9 +82,23 @@ class onnxModifier:
         for left_node in self.graph.node:
             left_node_inputs += left_node.input
         
-        for init_name in self.initilizer_name2module.keys():
+        for init_name in self.initializer_name2module.keys():
             if not init_name in left_node_inputs:
-                self.initializer.remove(self.initilizer_name2module[init_name])
+                self.initializer.remove(self.initializer_name2module[init_name])
+        
+        # remove the left unused Constant nodes
+        for left_node in self.graph.node:
+            if left_node.op_type == "Constant":
+                output_deleted = [False] * len(left_node.output)
+                for i, output in enumerate(left_node.output):
+                    if not (output in left_node_inputs):
+                        output_deleted[i] = True
+
+                const_node_left_output = [left_node.output[i] for i in range(len(left_node.output)) if not output_deleted[i]]
+                if len(const_node_left_output) == 0:
+                    self.graph.node.remove(self.node_name2module[left_node.name]) 
+                    # self.initializer.remove(self.initializer_name2module[init_name])
+            
     
     def modify_node_io_name(self, node_renamed_io):
         # print(node_renamed_io)
@@ -113,8 +127,9 @@ class onnxModifier:
 
     
     def modify(self, modify_info):
+        # print(modify_info['node_states'])
         # print(modify_info['node_renamed_io'])
-        print(modify_info['added_node_info'])
+        # print(modify_info['added_node_info'])
         self.remove_node_by_node_states(modify_info['node_states'])
         self.modify_node_io_name(modify_info['node_renamed_io'])  
         self.add_node(modify_info['added_node_info'], modify_info['node_states'])    
@@ -155,7 +170,9 @@ if __name__ == "__main__":
     # model_path = "C:\\Users\\ZhangGe\\Desktop\\squeezenet1.0-3.onnx"
     # model_path = "C:\\Users\\ZhangGe\\Desktop\\squeezenet1.0-12-int8.onnx"
     # model_path = "C:\\Users\\ZhangGe\\Desktop\\tflite_sim.onnx"
-    model_path = "C:\\Users\\ZhangGe\\Desktop\\modified_modified_squeezenet1.0-12.onnx"
+    # model_path = "C:\\Users\\ZhangGe\\Desktop\\modified_modified_squeezenet1.0-12.onnx"
+    model_path = "C:\\Users\\ZhangGe\\Desktop\\modified_mobilenetv2-7.onnx"
+    # model_path = "C:\\Users\\ZhangGe\\Desktop\\mobilenetv2-7.onnx"
     onnx_modifier = onnxModifier.from_model_path(model_path)
     
     def explore_basic():
@@ -177,40 +194,52 @@ if __name__ == "__main__":
     # explore_basic()
    
     def remove_node_by_node_states():
-        print(len(onnx_modifier.graph.node))
-        print(len(onnx_modifier.graph.initializer))
-        node_states_fp = {}
-        node_states_quant = {}
+        # print(len(onnx_modifier.graph.node))
+        # print(len(onnx_modifier.graph.initializer))
 
-        node_states = node_states_quant
-        # node_states = node_states_fp
+        # print(onnx_modifier.node_name2module.keys())
+        # print(onnx_modifier.graph.node)
+        # for node in onnx_modifier.graph.node:
+        #     print(node.name)
+        #     print(node.input)
+        #     print(node.output)
+        
+        
+        node_states = {'input': 'Exist', 'Conv_0': 'Exist', 'Conv_95': 'Exist', 'Clip_96': 'Deleted', 'GlobalAveragePool_97': 'Deleted', 'Shape_98': 'Deleted', 'Gather_100': 'Deleted', 'Unsqueeze_101': 'Deleted', 'Concat_102': 'Deleted', 'Reshape_103': 'Deleted', 'Gemm_104': 'Deleted', 'out_output': 'Deleted'}
         # print('\graph  input')
         # for inp in onnx_modifier.graph.input:
         #     print(inp.name)
         onnx_modifier.remove_node_by_node_states(node_states)
-        print(len(onnx_modifier.graph.node))
-        print(len(onnx_modifier.graph.initializer))
-        print(len(onnx_modifier.initilizer_name2module.keys()))
-        # print(onnx_modifier.initilizer_name2module.keys())
-        # for i, k in enumerate(onnx_modifier.initilizer_name2module.keys()):
+        # print(len(onnx_modifier.graph.node))
+        # print(len(onnx_modifier.graph.initializer))
+        # print(len(onnx_modifier.initializer_name2module.keys()))
+
+        for node in onnx_modifier.graph.node:
+            print(node.name)
+            print(node.input, node.output)
+        for initializer in onnx_modifier.initializer:
+            print(initializer.name)
+        
+        # print(onnx_modifier.initializer_name2module.keys())
+        # for i, k in enumerate(onnx_modifier.initializer_name2module.keys()):
         #     print("\nremoving", i, k)
-        #     onnx_modifier.graph.initializer.remove(onnx_modifier.initilizer_name2module[k])
+        #     onnx_modifier.graph.initializer.remove(onnx_modifier.initializer_name2module[k])
         #     print("removed")
             
-        print('\nleft initializers:')
-        for initializer in onnx_modifier.model_proto.graph.initializer:
-            print(initializer.name)
+        # print('\nleft initializers:')
+        # for initializer in onnx_modifier.model_proto.graph.initializer:
+        #     print(initializer.name)
         
-        print('\nleft nodes:')
-        for node in onnx_modifier.graph.node:
-            print(node.name)
+        # print('\nleft nodes:')
+        # for node in onnx_modifier.graph.node:
+        #     print(node.name)
         
-        print('\nleft input')
-        for inp in onnx_modifier.graph.input:
-            print(inp.name)
+        # print('\nleft input')
+        # for inp in onnx_modifier.graph.input:
+        #     print(inp.name)
         
         onnx_modifier.check_and_save_model()
-    # remove_node_by_node_states()
+    remove_node_by_node_states()
     
 
     def test_modify_node_io_name():
@@ -227,6 +256,6 @@ if __name__ == "__main__":
         onnx_modifier.inference()
         onnx_modifier.check_and_save_model()  
         
-    test_add_node()
+    # test_add_node()
         
         
\ No newline at end of file