diff --git a/tools/train.py b/tools/train.py
index 922d871ff8a09fb00a31d38c6d9c38e6f1aa7456..993907136656f789dd8841a1636af6ea515177c8 100644
--- a/tools/train.py
+++ b/tools/train.py
@@ -42,7 +42,7 @@ def parse_args():
     parser.add_argument(
         '--vdl_dir',
         type=str,
-        default="scaler",
+        default=None,
         help='VisualDL logging directory for image.')
     parser.add_argument(
         '-o',