diff --git a/src/main/java/com/example/building/service/impl/ProductServiceImpl.java b/src/main/java/com/example/building/service/impl/ProductServiceImpl.java
index 8f1e998..7695616 100644
--- a/src/main/java/com/example/building/service/impl/ProductServiceImpl.java
+++ b/src/main/java/com/example/building/service/impl/ProductServiceImpl.java
@@ -68,9 +68,16 @@ public class ProductServiceImpl implements ProductService {
 
     /**
      * 删除分类
+     * 检查是否有商品使用该分类，存在则不允许删除
      */
     @Override
     public void deleteCategory(String id) {
+        // 检查是否有商品使用该分类
+        Long count = productMapper.selectCount(new LambdaQueryWrapper<Product>()
+                .eq(Product::getCategoryId, id));
+        if (count > 0) {
+            throw new RuntimeException("该分类下有商品，无法删除");
+        }
         categoryMapper.deleteById(id);
     }