diff --git a/ppdet/engine/trainer.py b/ppdet/engine/trainer.py
index e124855f928da30884279ea168b98a28da533faf..de188e8e1812d3ffbd510a64a330cf94a90b886d 100644
--- a/ppdet/engine/trainer.py
+++ b/ppdet/engine/trainer.py
@@ -204,7 +204,7 @@ class Trainer(object):
         classwise = self.cfg['classwise'] if 'classwise' in self.cfg else False
         if self.cfg.metric == 'COCO' or self.cfg.metric == "SNIPERCOCO":
             # TODO: bias should be unified
-            bias = self.cfg['bias'] if 'bias' in self.cfg else 0
+            bias = 1 if self.cfg.get('bias', False) else 0
             output_eval = self.cfg['output_eval'] \
                 if 'output_eval' in self.cfg else None
             save_prediction_only = self.cfg.get('save_prediction_only', False)
diff --git a/ppdet/utils/cli.py b/ppdet/utils/cli.py
index b8ba59d78f1ddf606012fd0cf6d71a71d79eea05..2c5acc0e591af4bbd07a1d22e1237656ac47da65 100644
--- a/ppdet/utils/cli.py
+++ b/ppdet/utils/cli.py
@@ -81,6 +81,13 @@ class ArgsParser(ArgumentParser):
         return config
 
 
+def merge_args(config, args, exclude_args=['config', 'opt', 'slim_config']):
+    for k, v in vars(args).items():
+        if k not in exclude_args:
+            config[k] = v
+    return config
+
+
 def print_total_cfg(config):
     modules = get_registered_modules()
     color_tty = ColorTTY()
diff --git a/tools/eval.py b/tools/eval.py
index 308dd8fbbeb2fb19d2d006ef259c2ec43c3ec28e..3128261b068aba9f5b8cf2ba882d11e5a9646143 100755
--- a/tools/eval.py
+++ b/tools/eval.py
@@ -31,7 +31,7 @@ import paddle
 
 from ppdet.core.workspace import load_config, merge_config
 from ppdet.utils.check import check_gpu, check_npu, check_xpu, check_version, check_config
-from ppdet.utils.cli import ArgsParser
+from ppdet.utils.cli import ArgsParser, merge_args
 from ppdet.engine import Trainer, init_parallel_env
 from ppdet.metrics.coco_utils import json_eval_results
 from ppdet.slim import build_slim_model
@@ -109,11 +109,7 @@ def run(FLAGS, cfg):
 def main():
     FLAGS = parse_args()
     cfg = load_config(FLAGS.config)
-    # TODO: bias should be unified
-    cfg['bias'] = 1 if FLAGS.bias else 0
-    cfg['classwise'] = True if FLAGS.classwise else False
-    cfg['output_eval'] = FLAGS.output_eval
-    cfg['save_prediction_only'] = FLAGS.save_prediction_only
+    merge_args(cfg, FLAGS)
     merge_config(FLAGS.opt)
 
     # disable npu in config by default
@@ -133,9 +129,6 @@ def main():
     else:
         place = paddle.set_device('cpu')
 
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn' and not cfg.use_gpu:
-        cfg['norm_type'] = 'bn'
-
     if FLAGS.slim_config:
         cfg = build_slim_model(cfg, FLAGS.slim_config, mode='eval')
 
diff --git a/tools/eval_mot.py b/tools/eval_mot.py
index 7769892730adbb52e71751d3ed9de97fe70e6ecb..a9ca517030a31eb80fd239cca42602355db140d1 100644
--- a/tools/eval_mot.py
+++ b/tools/eval_mot.py
@@ -121,9 +121,6 @@ def main():
     else:
         place = paddle.set_device('cpu')
 
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn' and not cfg.use_gpu:
-        cfg['norm_type'] = 'bn'
-
     check_config(cfg)
     check_gpu(cfg.use_gpu)
     check_npu(cfg.use_npu)
diff --git a/tools/export_model.py b/tools/export_model.py
index 3a417a37cc93aa41143d5906a5e674a19d69d2c4..1eaac7a76723540e7613f43c300bbb1fb3f1e76f 100644
--- a/tools/export_model.py
+++ b/tools/export_model.py
@@ -90,9 +90,6 @@ def main():
     paddle.set_device("cpu")
     FLAGS = parse_args()
     cfg = load_config(FLAGS.config)
-    # TODO: to be refined in the future
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn':
-        FLAGS.opt['norm_type'] = 'bn'
     merge_config(FLAGS.opt)
 
     if FLAGS.slim_config:
diff --git a/tools/infer.py b/tools/infer.py
index 1980ced033b44253d5ee6311ceef819bcdda4b7c..3a5674e7b913739b40e7a84ea75232c96fa0025a 100755
--- a/tools/infer.py
+++ b/tools/infer.py
@@ -32,7 +32,7 @@ import paddle
 from ppdet.core.workspace import load_config, merge_config
 from ppdet.engine import Trainer
 from ppdet.utils.check import check_gpu, check_npu, check_xpu, check_version, check_config
-from ppdet.utils.cli import ArgsParser
+from ppdet.utils.cli import ArgsParser, merge_args
 from ppdet.slim import build_slim_model
 
 from ppdet.utils.logger import setup_logger
@@ -137,8 +137,7 @@ def run(FLAGS, cfg):
 def main():
     FLAGS = parse_args()
     cfg = load_config(FLAGS.config)
-    cfg['use_vdl'] = FLAGS.use_vdl
-    cfg['vdl_log_dir'] = FLAGS.vdl_log_dir
+    merge_args(cfg, FLAGS)
     merge_config(FLAGS.opt)
 
     # disable npu in config by default
@@ -158,9 +157,6 @@ def main():
     else:
         place = paddle.set_device('cpu')
 
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn' and not cfg.use_gpu:
-        cfg['norm_type'] = 'bn'
-
     if FLAGS.slim_config:
         cfg = build_slim_model(cfg, FLAGS.slim_config, mode='test')
 
diff --git a/tools/infer_mot.py b/tools/infer_mot.py
index 9ede62b617b30b9ffd7aea701eb85f04747950ac..ef13bff932b923a3f262954c13f09966e5cd1460 100644
--- a/tools/infer_mot.py
+++ b/tools/infer_mot.py
@@ -133,9 +133,6 @@ def main():
     else:
         place = paddle.set_device('cpu')
 
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn' and not cfg.use_gpu:
-        cfg['norm_type'] = 'bn'
-
     check_config(cfg)
     check_gpu(cfg.use_gpu)
     check_npu(cfg.use_npu)
diff --git a/tools/train.py b/tools/train.py
index ddbf24fdaadaff781c4cd57a0df40bf1d3340c97..8e4977e7798c2c7ab55aeb21533837bf29a5b802 100755
--- a/tools/train.py
+++ b/tools/train.py
@@ -33,14 +33,14 @@ from ppdet.core.workspace import load_config, merge_config
 from ppdet.engine import Trainer, init_parallel_env, set_random_seed, init_fleet_env
 from ppdet.slim import build_slim_model
 
-import ppdet.utils.cli as cli
+from ppdet.utils.cli import ArgsParser, merge_args
 import ppdet.utils.check as check
 from ppdet.utils.logger import setup_logger
 logger = setup_logger('train')
 
 
 def parse_args():
-    parser = cli.ArgsParser()
+    parser = ArgsParser()
     parser.add_argument(
         "--eval",
         action='store_true',
@@ -130,14 +130,7 @@ def run(FLAGS, cfg):
 def main():
     FLAGS = parse_args()
     cfg = load_config(FLAGS.config)
-    cfg['amp'] = FLAGS.amp
-    cfg['fleet'] = FLAGS.fleet
-    cfg['use_vdl'] = FLAGS.use_vdl
-    cfg['vdl_log_dir'] = FLAGS.vdl_log_dir
-    cfg['save_prediction_only'] = FLAGS.save_prediction_only
-    cfg['profiler_options'] = FLAGS.profiler_options
-    cfg['save_proposals'] = FLAGS.save_proposals
-    cfg['proposals_path'] = FLAGS.proposals_path
+    merge_args(cfg, FLAGS)
     merge_config(FLAGS.opt)
 
     # disable npu in config by default
@@ -157,9 +150,6 @@ def main():
     else:
         place = paddle.set_device('cpu')
 
-    if 'norm_type' in cfg and cfg['norm_type'] == 'sync_bn' and not cfg.use_gpu:
-        cfg['norm_type'] = 'bn'
-
     if FLAGS.slim_config:
         cfg = build_slim_model(cfg, FLAGS.slim_config)