diff --git a/mindinsight/mindconverter/cli.py b/mindinsight/mindconverter/cli.py
index 08881c76..a5833186 100644
--- a/mindinsight/mindconverter/cli.py
+++ b/mindinsight/mindconverter/cli.py
@@ -21,7 +21,7 @@ import mindinsight
 from mindinsight.mindconverter.converter import main
 from mindinsight.mindconverter.graph_based_converter.common.utils import get_framework_type
 from mindinsight.mindconverter.graph_based_converter.constant import ARGUMENT_LENGTH_LIMIT, \
-ARGUMENT_NUM_LIMIT, ARGUMENT_LEN_LIMIT, FrameworkType
+    ARGUMENT_NUM_LIMIT, ARGUMENT_LEN_LIMIT, FrameworkType
 from mindinsight.mindconverter.graph_based_converter.framework import main_graph_base_converter
 
 from mindinsight.mindconverter.common.log import logger as log, logger_console as log_console
@@ -283,11 +283,19 @@ class NodeAction(argparse.Action):
         ArgsCheck.check_repeated(namespace, self.dest, self.default, option_string, parser_in)
         if len(values) > ARGUMENT_NUM_LIMIT:
             parser_in.error(f"The length of {option_string} {values} should be no more than {ARGUMENT_NUM_LIMIT}.")
+        deduplicated = set()
+        abnormal_nodes = []
         for v in values:
             if len(v) > ARGUMENT_LENGTH_LIMIT:
                 parser_in.error(
                     f"The length of {option_string} {v} should be no more than {ARGUMENT_LENGTH_LIMIT}."
                 )
+            if v in deduplicated:
+                abnormal_nodes.append(v)
+                continue
+            deduplicated.add(v)
+        if abnormal_nodes:
+            parser_in.error(f"{', '.join(abnormal_nodes)} {'is' if len(abnormal_nodes) == 1 else 'are'} duplicated.")
         setattr(namespace, self.dest, values)
 
 
diff --git a/mindinsight/mindconverter/graph_based_converter/framework.py b/mindinsight/mindconverter/graph_based_converter/framework.py
index 8438c404..1422b5b3 100644
--- a/mindinsight/mindconverter/graph_based_converter/framework.py
+++ b/mindinsight/mindconverter/graph_based_converter/framework.py
@@ -281,8 +281,7 @@ def main_graph_base_converter(file_config):
         check_params = ['input_nodes', 'output_nodes']
         check_params_exist(check_params, file_config)
 
-    if len(file_config['shape']) != len(file_config.get("input_nodes", [])) != len(
-            set(file_config.get("input_nodes", []))):
+    if len(file_config['shape']) != len(file_config.get("input_nodes", [])):
         raise BadParamError("`--shape` and `--input_nodes` must have the same length, "
                             "and no redundant node in `--input_nodes`.")