diff --git a/models/command.go b/models/command.go
index 6ccf9b0..84823e0 100644
--- a/models/command.go
+++ b/models/command.go
@@ -316,7 +316,9 @@ var codeSignals = []CodeSignal{
 		Admin:   true,
 		Handle: func(sender *Sender) interface{} {
 			ctt := sender.JoinContens()
-			db.Model(&UserAdmin{}).Delete("", ctt)
+			db.Delete(&UserAdmin{
+				Content: ctt,
+			})
 			return "已取消管理员"
 		},
 	},