diff --git a/route/group_power_r/group_rank.go b/route/group_power_r/group_rank.go
index 8207bfb7969aba6b0f04cea6678074c19efb8aae..04d97e673231872d7f2af101beb1775e1adc7b5b 100644
--- a/route/group_power_r/group_rank.go
+++ b/route/group_power_r/group_rank.go
@@ -198,7 +198,7 @@ func GroupPowerGradeDetail(c *gin.Context) (*mycontext.MyContext, error) {
 	grade := gradeM[groupPowerId]
 	nextExp := mysql.Num(0)
 	if grade.Grade != groupPower_e.GroupPowerGradeMax {
-		nextExp = groupPower_e.GroupPowerGradeExp[grade.Grade+1] - groupPower_e.GroupPowerGradeExp[grade.Grade]
+		nextExp = groupPower_e.GroupPowerGradeExp[grade.Grade+1]
 	}
 	expireAt := ""
 	if grade.ExpireAt.After(time.Now()) {