diff --git a/vnpy/trader/app/dataRecorder/drEngine.py b/vnpy/trader/app/dataRecorder/drEngine.py
index 63a20e57..345f690c 100644
--- a/vnpy/trader/app/dataRecorder/drEngine.py
+++ b/vnpy/trader/app/dataRecorder/drEngine.py
@@ -247,7 +247,7 @@ class DrEngine(object):
                 
                 bar.date = tick.date
                 bar.time = tick.time
-                bar.datetime = tick.datetime
+                bar.datetime = tick.datetime.replace(second=0, microsecond=0)
                 bar.volume = tick.volume
                 bar.openInterest = tick.openInterest        
             # 否则继续累加新的K线