diff --git a/internal/api/activity/matching_game_helper.go b/internal/api/activity/matching_game_helper.go
index 652ad22..548a2e9 100755
--- a/internal/api/activity/matching_game_helper.go
+++ b/internal/api/activity/matching_game_helper.go
@@ -40,12 +40,12 @@ func matchingRewardDisplayName(name string, isDoubled bool) string {
 }
 
 type matchingSettlementPlan struct {
-	reward       *model.ActivityRewardSettings
-	quantity     int
-	productName  string
-	rewardName   string
-	cardToVoid   int64
-	drawLogID    int64
+	reward      *model.ActivityRewardSettings
+	quantity    int
+	productName string
+	rewardName  string
+	cardToVoid  int64
+	drawLogID   int64
 }
 
 // grantRewardHelper 发放奖励辅助函数
@@ -59,12 +59,13 @@ func (h *handler) grantRewardHelper(ctx context.Context, userID, orderID int64,
 
 	rid := r.ID
 	_, err := h.user.GrantRewardToOrder(ctx, userID, usersvc.GrantRewardToOrderRequest{
-		OrderID:    orderID,
-		ProductID:  r.ProductID,
-		Quantity:   quantity,
-		ActivityID: &actID,
-		RewardID:   &rid,
-		Remark:     remark,
+		OrderID:             orderID,
+		ProductID:           r.ProductID,
+		Quantity:            quantity,
+		ActivityID:          &actID,
+		RewardID:            &rid,
+		Remark:              remark,
+		SkipRewardInventory: true,
 	})
 	if err != nil {
 		h.logger.Error("Failed to grant reward to order", zap.Int64("order_id", orderID), zap.Error(err))
diff --git a/internal/service/user/reward_grant.go b/internal/service/user/reward_grant.go
index cba8ce9..b9bfbdf 100755
--- a/internal/service/user/reward_grant.go
+++ b/internal/service/user/reward_grant.go
@@ -280,12 +280,13 @@ func generateOrderNo() string {
 
 // GrantRewardToOrderRequest 在现有订单上发放奖励的请求参数
 type GrantRewardToOrderRequest struct {
-	OrderID    int64  `json:"order_id" binding:"required"`   // 现有订单ID
-	ProductID  int64  `json:"product_id" binding:"required"` // 商品ID
-	Quantity   int    `json:"quantity" binding:"min=1"`      // 发放数量
-	ActivityID *int64 `json:"activity_id,omitempty"`         // 活动ID（可选）
-	RewardID   *int64 `json:"reward_id,omitempty"`           // 奖励配置ID（可选）
-	Remark     string `json:"remark,omitempty"`              // 备注
+	OrderID             int64  `json:"order_id" binding:"required"`   // 现有订单ID
+	ProductID           int64  `json:"product_id" binding:"required"` // 商品ID
+	Quantity            int    `json:"quantity" binding:"min=1"`      // 发放数量
+	ActivityID          *int64 `json:"activity_id,omitempty"`         // 活动ID（可选）
+	RewardID            *int64 `json:"reward_id,omitempty"`           // 奖励配置ID（可选）
+	Remark              string `json:"remark,omitempty"`              // 备注
+	SkipRewardInventory bool   `json:"-"`                             // 跳过活动奖项库存扣减
 }
 
 // GrantRewardToOrderResponse 在现有订单上发放奖励的响应
@@ -330,18 +331,21 @@ func (s *service) GrantRewardToOrder(ctx context.Context, userID int64, req Gran
 		if req.RewardID != nil {
 			logger.Info("检查奖励配置", zap.Int64("reward_id", *req.RewardID))
 
-			// 【使用乐观锁扣减库存】直接用 Quantity > 0 作为更新条件，避免竞态
-			result, err := tx.ActivityRewardSettings.WithContext(ctx).Where(
-				tx.ActivityRewardSettings.ID.Eq(*req.RewardID),
-				tx.ActivityRewardSettings.Quantity.Gt(0), // 乐观锁：只有库存>0才能扣减
-			).UpdateSimple(tx.ActivityRewardSettings.Quantity.Add(-int64(req.Quantity)))
-			if err != nil {
-				logger.Error("扣减奖励库存失败", zap.Error(err))
-				return fmt.Errorf("扣减奖励库存失败: %w", err)
-			}
-			if result.RowsAffected == 0 {
-				logger.Error("奖励库存不足或不存在")
-				return fmt.Errorf("奖励库存不足或不存在")
+			if !req.SkipRewardInventory {
+				// 【使用乐观锁扣减库存】直接用 Quantity > 0 作为更新条件，避免竞态
+				result, err := tx.ActivityRewardSettings.WithContext(ctx).Where(
+					tx.ActivityRewardSettings.ID.Eq(*req.RewardID),
+					tx.ActivityRewardSettings.Quantity.Gt(0), // 乐观锁：只有库存>0才能扣减
+				).UpdateSimple(tx.ActivityRewardSettings.Quantity.Add(-int64(req.Quantity)))
+				if err != nil {
+					logger.Error("扣减奖励库存失败", zap.Error(err))
+					return fmt.Errorf("扣减奖励库存失败: %w", err)
+				}
+				if result.RowsAffected == 0 {
+					logger.Error("奖励库存不足或不存在")
+					return fmt.Errorf("奖励库存不足或不存在")
+				}
+				logger.Info("奖励库存扣减成功（乐观锁）")
 			}
 			rewardSetting, err = tx.ActivityRewardSettings.WithContext(ctx).Where(
 				tx.ActivityRewardSettings.ID.Eq(*req.RewardID),
@@ -350,7 +354,6 @@ func (s *service) GrantRewardToOrder(ctx context.Context, userID int64, req Gran
 				logger.Error("查询奖励配置失败", zap.Error(err))
 				return fmt.Errorf("查询奖励配置失败: %w", err)
 			}
-			logger.Info("奖励库存扣减成功（乐观锁）")
 		}
 
 		// 3. 查询商品信息快照