diff --git a/domain/model/groupPower_m/family.go b/domain/model/groupPower_m/family.go
index 4a07f1bbb9bb743ea0e33caf2362bc590ade31ea..3489bf904010d9bae39f63fb28bd640b24280695 100644
--- a/domain/model/groupPower_m/family.go
+++ b/domain/model/groupPower_m/family.go
@@ -113,22 +113,30 @@ func UpdateFamily(model *domain.Model, familyId uint64, name, nameplate, declara
 	if familyId == 0 || (name == "" && nameplate == "" && declaration == "" && icon == "") {
 		return nil
 	}
+	// 修改铭牌
+	if nameplate != "" {
+		sql := "UPDATE `group_power` a left join (SELECT ? `id` FROM group_power WHERE nameplate = ?) b on a.id = b.id SET a.`nameplate`=? where a.id=? and b.id is null;"
+		result := model.Db.Exec(sql, familyId, nameplate, nameplate, familyId)
+		if result.Error != nil {
+			return myerr.WrapErr(result.Error)
+		}
+		if result.RowsAffected <= 0 {
+			return myerr.WrapErr(bizerr.GroupPowerHaveChangeInfo)
+		}
+		return nil
+	}
 	db := model.Db.Model(GroupPower{})
 	updateMap := make(map[string]interface{})
 	if name != "" {
 		updateMap["name"] = name
 	}
-	if nameplate != "" {
-		updateMap["nameplate"] = nameplate
-		db = db.Where("not exists (select id from group_power where nameplate = ?)", nameplate)
-	}
 	if declaration != "" {
 		updateMap["declaration"] = declaration
 	}
 	if icon != "" {
 		updateMap["icon"] = icon
 	}
-	result := db.Where("id = ?", familyId).Updates(updateMap).Limit(1)
+	result := db.Where("group_power.id = ?", familyId).Updates(updateMap).Limit(1)
 	if result.Error != nil {
 		return myerr.WrapErr(result.Error)
 	}
diff --git a/route/group_power_r/group_power.go b/route/group_power_r/group_power.go
index cec52b414edaba08ed1e8c7d15db65473693d4a6..0f22f371e81336062eb888325fa8191441259702 100644
--- a/route/group_power_r/group_power.go
+++ b/route/group_power_r/group_power.go
@@ -768,6 +768,9 @@ func GroupPowerInfo(c *gin.Context) (*mycontext.MyContext, error) {
 		}
 		if groupInfo != nil {
 			info.Nameplate = groupInfo.Name
+			if len(info.Nameplate) > 6 {
+				info.Nameplate = info.Nameplate[:6]
+			}
 		}
 	}
 	// 家族月排名
@@ -1420,7 +1423,7 @@ func GroupPowerSetInfo(c *gin.Context) (*mycontext.MyContext, error) {
 			return myContext, bizerr.GroupPowerChangeNameplate
 		}
 		// 检查铭牌长度和唯一性
-		if len(para.Nameplate) > 10 {
+		if len(para.Nameplate) > 6 {
 			return myContext, bizerr.GroupPowerHaveTooLong
 		}
 		if groupPower_m.IsExistsNameplate(model, para.Nameplate) {