diff --git a/tools/train.py b/tools/train.py
index 1a6250901d0db1a09cc098aa0fa79edcb5bc3726..27551c599d883b9c17059df2d3c72b914598dfcd 100644
--- a/tools/train.py
+++ b/tools/train.py
@@ -221,7 +221,7 @@ def main():
 
     cfg_name = os.path.basename(FLAGS.config).split('.')[0]
     save_dir = os.path.join(cfg.save_dir, cfg_name)
-    time_stat = deque(maxlen=cfg.log_iter)
+    time_stat = deque(maxlen=cfg.log_smooth_window)
     best_box_ap_list = [0.0, 0]  #[map, iter]
 
     # use tb-paddle to log data