diff --git a/cmd/sync/command.go b/cmd/sync/command.go
index f85f4dbc..3400bdaf 100644
--- a/cmd/sync/command.go
+++ b/cmd/sync/command.go
@@ -22,6 +22,7 @@ func AddCommands(parent *cobra.Command) {
 			ch := notify.NewOfficialChanify(chanifyToken)
 
 			full := utils.Must1(cmd.Flags().GetBool(`full`))
+			every := utils.Must1(cmd.Flags().GetDuration(`every`))
 
 			cred := Credential{
 				Author:   os.Getenv(`AUTHOR`),
@@ -34,20 +35,39 @@ func AddCommands(parent *cobra.Command) {
 			}
 
 			gs := New(client.InitHostConfigs(), cred, ".", full)
-			for {
+
+			sync := func() error {
 				if err := gs.Sync(); err != nil {
 					ch.Send("同步失败", err.Error(), true)
-					log.Println(err)
-					time.Sleep(time.Minute * 15)
-					continue
-				} else {
-					log.Println(`同步完成。`)
-					ch.Send(`同步成功`, `全部完成，没有错误。`, false)
+					return err
+				}
+
+				ch.Send(`同步成功`, `全部完成，没有错误。`, false)
+				log.Println(`同步完成。`)
+				return nil
+			}
+
+			if every <= 0 {
+				if err := sync(); err != nil {
+					log.Fatalln(err)
+				}
+				os.Exit(0)
+			}
+
+			for {
+				for range 3 {
+					if err := sync(); err != nil {
+						log.Println(err)
+						time.Sleep(time.Second * 5)
+						continue
+					}
+					break
 				}
-				time.Sleep(time.Hour)
+				time.Sleep(every)
 			}
 		},
 	}
 	syncCmd.Flags().Bool(`full`, false, `初次备份是否全量扫描更新。`)
+	syncCmd.Flags().Duration(`every`, 0, `每隔多久同步一次。如果不设置，默认只同步一次。`)
 	parent.AddCommand(syncCmd)
 }