diff --git a/route/group_power_r/group_rank.go b/route/group_power_r/group_rank.go
index 0c4230aad8444a9b8110004af7ae09125d917b83..4705a24d1175db8918aea1f5004518998174023c 100644
--- a/route/group_power_r/group_rank.go
+++ b/route/group_power_r/group_rank.go
@@ -339,6 +339,9 @@ func GroupPowerGradeDetail(c *gin.Context) (*mycontext.MyContext, error) {
 	if grade.ExpireAt.After(time.Now()) {
 		expireAt = grade.ExpireAt.Add(-time.Second).Format("2006-01-02") // 减少一秒格式化天
 	}
+	if grade.Grade == groupPower_e.GroupPowerGrade0 {
+		expireAt = utils.AddDate(now.EndOfMonth(), 0, 1).Add(-time.Second).Format("2006-01-02") // 0级别(黑铁) 没有有效期,给下个月月底
+	}
 	isMember := false
 	if exits, id, err := groupPower_m.CheckGroupPowerUser(model, userId); err != nil {
 		return myContext, err