diff --git a/src/model/user_notice_time.go b/src/model/user_notice_time.go
index 6d24e72..614c91e 100644
--- a/src/model/user_notice_time.go
+++ b/src/model/user_notice_time.go
@@ -2,7 +2,7 @@ package model
 
 type UserNoticeTime struct {
 	Id              int `json:"id" xorm:"not null pk autoincr INT(11)"`
-	Uid             int `json:"uid" xorm:"default 0 INT(11)"`
+	Uid             int `json:"uid" xorm:"default 0 unique INT(11)"`
 	LoginNoticeTime int `json:"login_notice_time" xorm:"default 0 INT(11)"`
 	SignNoticeTime  int `json:"sign_notice_time" xorm:"default 0 INT(11)"`
 	LoginTime       int `json:"login_time" xorm:"default 0 INT(11)"`