diff --git a/internal/db/models/node_value_dao.go b/internal/db/models/node_value_dao.go
index c84b62fa..2c9ec20c 100644
--- a/internal/db/models/node_value_dao.go
+++ b/internal/db/models/node_value_dao.go
@@ -55,10 +55,10 @@ func (this *NodeValueDAO) CreateValue(tx *dbs.Tx, clusterId int64, role nodeconf
 		})
 }
 
-// DeleteExpiredValues 清除数据
-func (this *NodeValueDAO) DeleteExpiredValues(tx *dbs.Tx) error {
+// Clean 清除数据
+func (this *NodeValueDAO) Clean(tx *dbs.Tx) error {
 	// 删除N天之前的所有数据
-	expiredDays := 7
+	expiredDays := 2
 	day := timeutil.Format("Ymd", time.Now().AddDate(0, 0, -expiredDays))
 	_, err := this.Query(tx).
 		Where("day<:day").
diff --git a/internal/tasks/monitor_item_value_task.go b/internal/tasks/monitor_item_value_task.go
index 62fbcbb1..74d1c0fd 100644
--- a/internal/tasks/monitor_item_value_task.go
+++ b/internal/tasks/monitor_item_value_task.go
@@ -39,5 +39,5 @@ func (this *MonitorItemValueTask) Start() {
 }
 
 func (this *MonitorItemValueTask) Loop() error {
-	return models.SharedNodeValueDAO.DeleteExpiredValues(nil)
+	return models.SharedNodeValueDAO.Clean(nil)
 }