diff --git a/funasr/bin/train.py b/funasr/bin/train.py
index c54e851ac..474e85753 100755
--- a/funasr/bin/train.py
+++ b/funasr/bin/train.py
@@ -389,8 +389,8 @@ if __name__ == '__main__':
     parser = get_parser()
     args, extra_task_params = parser.parse_known_args()
     if extra_task_params:
-        task_args = build_args(args, extra_task_params)
-        args = argparse.Namespace(**vars(args), **vars(task_args))
+        args = build_args(args, parser, extra_task_params)
+        # args = argparse.Namespace(**vars(args), **vars(task_args))
 
     # set random seed
     set_all_random_seed(args.seed)
diff --git a/funasr/build_utils/build_args.py b/funasr/build_utils/build_args.py
index a50122da3..a0baaa72d 100644
--- a/funasr/build_utils/build_args.py
+++ b/funasr/build_utils/build_args.py
@@ -7,37 +7,37 @@ from funasr.utils.types import str2bool
 from funasr.utils.types import str_or_none
 
 
-def build_args(args, extra_task_params):
-    parser = config_argparse.ArgumentParser("Task related config")
+def build_args(args, parser, extra_task_params):
+    task_parser = config_argparse.ArgumentParser("Task related config")
     if args.task_name == "asr":
         from funasr.build_utils.build_asr_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
-        parser.add_argument(
+            class_choices.add_arguments(task_parser)
+        task_parser.add_argument(
             "--split_with_space",
             type=str2bool,
             default=True,
             help="whether to split text using <space>",
         )
-        parser.add_argument(
+        task_parser.add_argument(
             "--seg_dict_file",
             type=str,
             default=None,
             help="seg_dict_file for text processing",
         )
-        parser.add_argument(
+        task_parser.add_argument(
             "--input_size",
             type=int_or_none,
             default=None,
             help="The number of input dimension of the feature",
         )
-        parser.add_argument(
+        task_parser.add_argument(
             "--ctc_conf",
             action=NestedDictAction,
             default=get_default_kwargs(CTC),
             help="The keyword arguments for CTC class.",
         )
-        parser.add_argument(
+        task_parser.add_argument(
             "--cmvn_file",
             type=str_or_none,
             default=None,
@@ -47,8 +47,8 @@ def build_args(args, extra_task_params):
     elif args.task_name == "pretrain":
         from funasr.build_utils.build_pretrain_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
-        parser.add_argument(
+            class_choices.add_arguments(task_parser)
+        task_parser.add_argument(
             "--input_size",
             type=int_or_none,
             default=None,
@@ -58,18 +58,18 @@ def build_args(args, extra_task_params):
     elif args.task_name == "lm":
         from funasr.build_utils.build_lm_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
+            class_choices.add_arguments(task_parser)
 
     elif args.task_name == "punc":
         from funasr.build_utils.build_punc_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
+            class_choices.add_arguments(task_parser)
 
     elif args.task_name == "vad":
         from funasr.build_utils.build_vad_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
-        parser.add_argument(
+            class_choices.add_arguments(task_parser)
+        task_parser.add_argument(
             "--input_size",
             type=int_or_none,
             default=None,
@@ -79,10 +79,13 @@ def build_args(args, extra_task_params):
     elif args.task_name == "diar":
         from funasr.build_utils.build_diar_model import class_choices_list
         for class_choices in class_choices_list:
-            class_choices.add_arguments(parser)
+            class_choices.add_arguments(task_parser)
 
     else:
         raise NotImplementedError("Not supported task: {}".format(args.task_name))
 
+    for action in parser._actions:
+        task_parser._add_action(action)
+
     task_args = parser.parse_args(extra_task_params)
     return task_args