diff --git a/server/light_backtask/task/contribution.go b/server/light_backtask/task/contribution.go
index 64de15d2..01cc80a1 100644
--- a/server/light_backtask/task/contribution.go
+++ b/server/light_backtask/task/contribution.go
@@ -27,7 +27,7 @@ func (this* contribution) calc() {
 
 		nowTime = f5.GetApp().GetRealSeconds()
 		daySeconds := q5.GetDaySeconds(nowTime, 0)
-		sleepTime := daySeconds + 3600 * 24 - nowTime
+		sleepTime := daySeconds + 3600 * 24 - nowTime + 3
 		time.Sleep(time.Second * time.Duration(sleepTime))
 	}
 }