diff --git a/vnpy/trader/gateway/ctpGateway/ctpGateway.py b/vnpy/trader/gateway/ctpGateway/ctpGateway.py
index 49f6f518..c7cd21bf 100644
--- a/vnpy/trader/gateway/ctpGateway/ctpGateway.py
+++ b/vnpy/trader/gateway/ctpGateway/ctpGateway.py
@@ -413,7 +413,7 @@ class CtpMdApi(MdApi):
         tick.tradingDay = data['TradingDay']
 
         # 先根据交易日期，生成时间
-        tick.datetime = datetime.strptime(tick.date + ' ' + tick.time, '%Y-%m-%d %H:%M:%S')
+        tick.datetime = datetime.strptime(tick.date + ' ' + tick.time, '%Y%m%d %H:%M:%S.%f')
         # 修正时间
         if tick.datetime.hour >= 20:
             if tick.datetime.isoweekday() == 1: