diff --git a/pjcloud-supermarket/pjcloud-supermarket-api/src/main/java/com/bsd/pjcloud/supermarket/api/feign/RemoteSupermarketSpuService.java b/pjcloud-supermarket/pjcloud-supermarket-api/src/main/java/com/bsd/pjcloud/supermarket/api/feign/RemoteSupermarketSpuService.java
index bffc597d0..c3e755381 100644
--- a/pjcloud-supermarket/pjcloud-supermarket-api/src/main/java/com/bsd/pjcloud/supermarket/api/feign/RemoteSupermarketSpuService.java
+++ b/pjcloud-supermarket/pjcloud-supermarket-api/src/main/java/com/bsd/pjcloud/supermarket/api/feign/RemoteSupermarketSpuService.java
@@ -75,4 +75,15 @@ public interface RemoteSupermarketSpuService {
      */
     @PostMapping("/supermarketSpu/app/selectListAll")
     R  getSupermarketSpu(@RequestBody SupermarketSpuQueryDTO supermarketSpuQueryDTO);
+
+
+    /**
+     * 购物车效验库存
+     * @param spuId
+     * @param incrCount  扣减数量，正数负数都行
+     * @return
+     */
+    @GetMapping("/supermarketSpu/app/checkSpuStock")
+    R checkSpuStock(@RequestParam(value ="spuId")Long spuId,@RequestParam("incrCount")Integer incrCount);
+
 }
diff --git a/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/controller/SupermarketSpuController.java b/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/controller/SupermarketSpuController.java
index 18d30e4c6..5f9ce2c37 100644
--- a/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/controller/SupermarketSpuController.java
+++ b/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/controller/SupermarketSpuController.java
@@ -28,6 +28,7 @@ import org.springframework.http.HttpHeaders;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import io.swagger.v3.oas.annotations.Operation;
 import lombok.RequiredArgsConstructor;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -216,5 +217,18 @@ public class SupermarketSpuController {
         return R.ok(supermarketSpuService.getSupermarketSpuAppDetailById(id));
     }
 
+    @GetMapping("/app/checkSpuStock")
+    @SysLog("购物车效验库存")
+    @Transactional
+    public R checkSpuStock(@RequestParam(value ="spuId")Long spuId,@RequestParam("incrCount")Integer incrCount) {
+        SupermarketSpuEntity spu= supermarketSpuService.getById(spuId);
+        if (spu == null) {
+            R.failed("商品不存在");
+        }
+        if (spu.getStock()<Math.abs(incrCount)){
+            return R.failed("库存不足");
+        }
+        return R.ok();
+    }
 
 }
\ No newline at end of file
diff --git a/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/service/impl/SupermarketSpuServiceImpl.java b/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/service/impl/SupermarketSpuServiceImpl.java
index 9b4da6a31..e3b5b6314 100644
--- a/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/service/impl/SupermarketSpuServiceImpl.java
+++ b/pjcloud-supermarket/pjcloud-supermarket-biz/src/main/java/com/bsd/pjcloud/supermarket/service/impl/SupermarketSpuServiceImpl.java
@@ -124,12 +124,21 @@ public class SupermarketSpuServiceImpl extends ServiceImpl<SupermarketSpuMapper,
     public R updateSpuStock(SupermarketSpuUpdateStockReqDTO updateStockReqDTO) {
         // 更新 SKU 库存
         updateStockReqDTO.getItems().forEach(item -> {
-            int i = baseMapper.updateStock(item.getId(), item.getIncrCount());
-            if (item.getIncrCount() <= 0) {
-                if (i == 0) {
-                    R.failed("商品库存不足");
-                }
+            // 查询当前库存
+            SupermarketSpuEntity spu = baseMapper.selectById(item.getId());
+            if (spu == null) {
+                R.failed(spu.getProductName()+"商品不存在");
             }
+            // 检查库存是否足够
+            if (item.getIncrCount() < 0 && Math.abs(item.getIncrCount()) > spu.getStock()) {
+                R.failed(spu.getProductName()+"库存不足，无法完成操作");
+            }
+            int i = baseMapper.updateStock(item.getId(), item.getIncrCount());
+//            if (item.getIncrCount() <= 0) {
+//                if (i == 0) {
+//                    R.failed("商品库存不足");
+//                }
+//            }
         });
 
         return R.ok();