diff --git a/vnpy_tushare/tushare_datafeed.py b/vnpy_tushare/tushare_datafeed.py
index 558d0ed..2d0c87e 100644
--- a/vnpy_tushare/tushare_datafeed.py
+++ b/vnpy_tushare/tushare_datafeed.py
@@ -121,8 +121,8 @@ def query_bar_history(self, req: HistoryRequest) -> Optional[List[BarData]]:
         symbol: str = req.symbol
         exchange: Exchange = req.exchange
         interval: Interval = req.interval
-        start: datetime = req.start.strftime("%Y%m%d")
-        end: datetime = req.end.strftime("%Y%m%d")
+        start: datetime = req.start.strftime("%Y-%m-%d %H:%M:%S")
+        end: datetime = req.end.strftime("%Y-%m-%d %H:%M:%S")
 
         ts_symbol: str = to_ts_symbol(symbol, exchange)
         if not ts_symbol: