diff --git a/honey_box/pages/mall/detail.vue b/honey_box/pages/mall/detail.vue
index 3f9d6d99..da685101 100644
--- a/honey_box/pages/mall/detail.vue
+++ b/honey_box/pages/mall/detail.vue
@@ -246,6 +246,14 @@ export default {
 				}, 300);
 				return;
 			}
+			
+			// 检查库存
+			const remainStock = (this.goodsInfo.stock || 0) - (this.goodsInfo.sale_stock || 0);
+			if (remainStock <= 0) {
+				this.$c.msg('库存不足，兑换失败');
+				return;
+			}
+			
 			// 登录后如果还没加载支付信息，先加载
 			if (!this.orderData) {
 				this.loadDetail().then(() => {
@@ -301,6 +309,14 @@ export default {
 				this.$c.msg(this.$config.getAppSetting('currency2_name') + '不足');
 				return;
 			}
+			
+			// 再次检查库存（防止并发购买）
+			const remainStock = (this.goodsInfo.stock || 0) - (this.goodsInfo.sale_stock || 0);
+			if (remainStock <= 0) {
+				this.$c.msg('库存不足，兑换失败');
+				return;
+			}
+			
 			const res = await createMallOrder({ goods_id: this.goodsId, prize_num: 1 });
 			if (res.status == 1) {
 				this.$refs.orderPop.close();
diff --git a/server/HoneyBox/src/HoneyBox.Core/Services/OrderService.cs b/server/HoneyBox/src/HoneyBox.Core/Services/OrderService.cs
index 61a59686..74251dad 100644
--- a/server/HoneyBox/src/HoneyBox.Core/Services/OrderService.cs
+++ b/server/HoneyBox/src/HoneyBox.Core/Services/OrderService.cs
@@ -2415,7 +2415,7 @@ public class OrderService : IOrderService
 
             if (prizeItem == null)
             {
-                throw new InvalidOperationException("暂无奖品信息");
+                throw new InvalidOperationException("库存不足，兑换失败");
             }
 
             // 12. 扣减奖品库存