diff --git a/routers/repo/cloudbrain_statistic.go b/routers/repo/cloudbrain_statistic.go
index 880ff7b8a0..6ff3774910 100644
--- a/routers/repo/cloudbrain_statistic.go
+++ b/routers/repo/cloudbrain_statistic.go
@@ -29,7 +29,7 @@ func CloudbrainDurationStatisticHour() {
 			statisticTime = currentTime
 		}
 
-		err = models.DeleteCloudbrainDurationStatistic(timeutil.TimeStamp(statisticTime.Unix()), timeutil.TimeStamp(currentTime.Unix()))
+		err = models.DeleteCloudbrainDurationStatistic(timeutil.TimeStamp(statisticTime.Add(-1*time.Hour).Unix()), timeutil.TimeStamp(currentTime.Unix()))
 		if err != nil {
 			log.Error("DeleteCloudbrainDurationStatistic failed", err)
 		}