diff --git a/queue/logic/order/activateOrderLogic.go b/queue/logic/order/activateOrderLogic.go
index ebbbafb..f8d84a5 100644
--- a/queue/logic/order/activateOrderLogic.go
+++ b/queue/logic/order/activateOrderLogic.go
@@ -229,9 +229,14 @@ func (l *ActivateOrderLogic) NewPurchase(ctx context.Context, orderInfo *order.O
 
 	var userSub *user.Subscribe
 
-	// 单订阅模式下，优先兜底为“续费语义”：延长已购订阅，避免并发下重复创建 user_subscribe
+	// 单订阅模式下，优先兜底为”续费语义”：延长已购订阅，避免并发下重复创建 user_subscribe
 	if l.svc.Config.Subscribe.SingleModel {
-		anchorSub, anchorErr := l.svc.UserModel.FindSingleModeAnchorSubscribe(ctx, orderInfo.UserId)
+		// 家庭组场景：订阅实际属于 SubscriptionUserId（成员/主），而非付款人 UserId
+		singleModeUserId := orderInfo.UserId
+		if orderInfo.SubscriptionUserId > 0 {
+			singleModeUserId = orderInfo.SubscriptionUserId
+		}
+		anchorSub, anchorErr := l.svc.UserModel.FindSingleModeAnchorSubscribe(ctx, singleModeUserId)
 		switch {
 		case anchorErr == nil && anchorSub != nil:
 			if orderInfo.ParentId == 0 && anchorSub.OrderId > 0 && anchorSub.OrderId != orderInfo.Id {