diff --git a/domain/model/groupPower_m/group_grade.go b/domain/model/groupPower_m/group_grade.go
index 698f795a256d6824a1dcd57fb57273003002c87e..5f1ba37bfeb76d7fc4b0363a862bee86a6f77fab 100644
--- a/domain/model/groupPower_m/group_grade.go
+++ b/domain/model/groupPower_m/group_grade.go
@@ -233,7 +233,7 @@ func IncrGroupPowerStarOnMic(model *domain.Model, groupPowerId, userId mysql.ID,
 		if err != nil && err != gorm.ErrRecordNotFound {
 			return err
 		}
-		if star != nil && joinMicTimestamp == star.LastCalTs {
+		if star != nil && joinMicTimestamp < star.LastCalTs { // 加入的时间比上次计算时间小
 			curTs = star.LastCalTs
 		}
 		score := nowTs - curTs