diff --git a/qlib/model/trainer.py b/qlib/model/trainer.py
index a534a7a3b..3f1ae8a96 100644
--- a/qlib/model/trainer.py
+++ b/qlib/model/trainer.py
@@ -12,7 +12,6 @@ In ``DelayTrainer``, the first step is only to save some necessary info to model
 """
 
 import socket
-import time
 from typing import Callable, List
 
 from qlib.data.dataset import Dataset