diff --git a/domain/model/groupPower_m/group_grade.go b/domain/model/groupPower_m/group_grade.go
index 978b413e902ff67a2147cb28dd97c1bce8f6ac03..04b14d17da712e09ed131b03b4b7bc02dc82188a 100644
--- a/domain/model/groupPower_m/group_grade.go
+++ b/domain/model/groupPower_m/group_grade.go
@@ -3,6 +3,8 @@ package groupPower_m
 import (
 	"git.hilo.cn/hilo-common/domain"
 	"git.hilo.cn/hilo-common/resource/mysql"
+	"git.hilo.cn/hilo-common/utils"
+	"github.com/jinzhu/now"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 	"hilo-group/_const/enum/groupPower_e"
@@ -68,7 +70,13 @@ func IncrGroupPowerExp(txModel *domain.Model, groupPowerId mysql.ID, exp int64)
 	for grade := groupPower_e.GroupPowerGradeMax; grade >= groupPower_e.GroupPowerGrade0; grade-- {
 		if latestGrade.Exp > groupPower_e.GroupPowerGradeExp[grade] {
 			if latestGrade.Grade != grade {
-				if err = txModel.DB().Model(GroupPowerGrade{}).Where("group_power_id = ?", latestGrade.GroupPowerId).UpdateColumn("grade", grade).Error; err != nil {
+				expireAt := now.EndOfMonth()
+				expireAt = utils.AddDate(expireAt, 0, 1) // 等级有效期到下个月月底
+				updateAttrs := map[string]interface{}{
+					"grade":     grade,
+					"expire_at": expireAt,
+				}
+				if err = txModel.DB().Model(GroupPowerGrade{}).Where("group_power_id = ?", latestGrade.GroupPowerId).UpdateColumns(updateAttrs).Error; err != nil {
 					return err
 				}
 			}