diff --git a/modules/mainline/api_booschallengeover.go b/modules/mainline/api_booschallengeover.go
index 4e50ab3d9..a0daa091c 100644
--- a/modules/mainline/api_booschallengeover.go
+++ b/modules/mainline/api_booschallengeover.go
@@ -67,8 +67,9 @@ func (this *apiComp) BoosChallengeOver(session comm.IUserSession, req *pb.Mainli
 		this.module.Debugf("Mline Boos DispenseRes err:+%v", conf.Reward)
 		return
 	}
-
-	info.Chapterboos[conf.MonsterChapter] = conf.MonsterStrength
+	if info.Chapterboos[conf.MonsterChapter] < conf.MonsterStrength {
+		info.Chapterboos[conf.MonsterChapter] = conf.MonsterStrength
+	}
 	info.Currbooschallengenum++
 	if err = this.module.modelMline.Change(session.GetUserId(), map[string]interface{}{
 		"chapterboos":          info.Chapterboos,