diff --git a/handler/scoresaber/score.go b/handler/scoresaber/score.go
index f0f61de..eb066f7 100644
--- a/handler/scoresaber/score.go
+++ b/handler/scoresaber/score.go
@@ -42,9 +42,9 @@ func ssPlusN(msg model.Message) (reply model.Reply) {
 	var N int
 	if len(msg.RawMsg) > len("ss+") {
 		N, err = strconv.Atoi(msg.RawMsg[len("ss+"):])
-		if err != nil {
+		if err != nil || N <= 0 {
 			return model.Reply{
-				ReplyMsg:       "请输入一个整数",
+				ReplyMsg:       "请输入一个正整数",
 				ReferOriginMsg: true,
 				FromMsg:        msg,
 			}