diff --git a/src/main/java/com/xujie/modules/order/controller/PODetailController.java b/src/main/java/com/xujie/modules/order/controller/PODetailController.java
index 7b74587..e78a52a 100644
--- a/src/main/java/com/xujie/modules/order/controller/PODetailController.java
+++ b/src/main/java/com/xujie/modules/order/controller/PODetailController.java
@@ -235,5 +235,4 @@ public class PODetailController {
         }
     }
 
-    
 }
diff --git a/src/main/java/com/xujie/modules/order/dao/PODetailMapper.java b/src/main/java/com/xujie/modules/order/dao/PODetailMapper.java
index daf8381..7c51968 100644
--- a/src/main/java/com/xujie/modules/order/dao/PODetailMapper.java
+++ b/src/main/java/com/xujie/modules/order/dao/PODetailMapper.java
@@ -33,4 +33,15 @@ public interface PODetailMapper extends BaseMapper<PODetail> {
 
     Integer getMaxItemNo(@Param("poNo") String poNo,
                          @Param("site") String site);
+
+    /**
+     * 检查订单明细是否已存在(用于防止重复上传)
+     * @param orderNo 订单号
+     * @param site 工厂编码
+     * @param item 款号
+     * @return 存在的记录数
+     */
+    Integer countByOrderAndItem(@Param("orderNo") String orderNo,
+                                @Param("site") String site,
+                                @Param("item") String item);
 }
diff --git a/src/main/java/com/xujie/modules/order/service/Impl/PODetailServiceImpl.java b/src/main/java/com/xujie/modules/order/service/Impl/PODetailServiceImpl.java
index e1a00a0..616a42a 100644
--- a/src/main/java/com/xujie/modules/order/service/Impl/PODetailServiceImpl.java
+++ b/src/main/java/com/xujie/modules/order/service/Impl/PODetailServiceImpl.java
@@ -145,19 +145,22 @@ public class PODetailServiceImpl extends ServiceImpl<PODetailMapper, PODetail> i
 
             SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
 
-            //  新增：控制 item_no（每个PO递增）
+            //  新增:控制 item_no(每个PO递增)
             Map<String, Integer> orderLineMap = new HashMap<>();
-
-            // 获取当前用户（避免循环里重复取）
+            
+            // 获取当前用户(避免循环里重复取)
             SysUserEntity currentUser = (SysUserEntity) SecurityUtils.getSubject().getPrincipal();
             if (currentUser == null || currentUser.getSite() == null) {
                 throw new RuntimeException("无法获取当前用户站点信息");
             }
             String site = currentUser.getSite();
-
+            
             if (site == null) {
-                throw new RuntimeException("当前用户site为空！");
+                throw new RuntimeException("当前用户site为空!");
             }
+            
+            // 用于收集重复数据的信息
+            List<String> duplicateItems = new ArrayList<>();
             // 转换并保存每条数据
             for (PODetailExcelDTO excelDTO : excelList) {
 
@@ -216,13 +219,23 @@ public class PODetailServiceImpl extends ServiceImpl<PODetailMapper, PODetail> i
                     }
                 }
 
-                // ========== 2. 生成 item_no（核心） ==========
+                // ========== 2. 检查是否重复 ==========
                 String poNo = excelDTO.getPoNo();
+                String item = excelDTO.getItem();
+                                
+                // 检查数据库中是否已存在相同的订单号+款号
+                Integer existCount = baseMapper.countByOrderAndItem(poNo, site, item);
+                if (existCount != null && existCount > 0) {
+                    duplicateItems.add("订单号: " + poNo + ", 款号: " + item);
+                    continue; // 跳过重复数据，继续处理下一条
+                }
+                
+                // ========== 3. 生成 item_no(核心) ==========
                 Integer maxItemNo = baseMapper.getMaxItemNo(poNo, site);
                 int lineNo = (maxItemNo == null ? 0 : maxItemNo) + 1;
                 orderLineMap.put(poNo, lineNo);
 
-                // ========== 3. 保存 PODetail ==========
+                // ========== 4. 保存 PODetail ==========
                 PODetailVo poDetailVo = new PODetailVo();
 
                 //  主键字段（必须）
@@ -276,6 +289,12 @@ public class PODetailServiceImpl extends ServiceImpl<PODetailMapper, PODetail> i
                 }
             }
 
+            // 如果有重复数据，抛出异常并提示
+            if (!duplicateItems.isEmpty()) {
+                String duplicateMsg = String.join("; ", duplicateItems);
+                throw new RuntimeException("以下数据已存在，跳过保存: " + duplicateMsg);
+            }
+
         } catch (IOException e) {
             throw new RuntimeException("文件读取失败: " + e.getMessage());
         }
diff --git a/src/main/resources/mapper/order/PODetailMapper.xml b/src/main/resources/mapper/order/PODetailMapper.xml
index 358f109..0d0076f 100644
--- a/src/main/resources/mapper/order/PODetailMapper.xml
+++ b/src/main/resources/mapper/order/PODetailMapper.xml
@@ -491,4 +491,13 @@
         WHERE order_no = #{poNo}
           AND site = #{site}
     </select>
+
+    <select id="countByOrderAndItem" resultType="java.lang.Integer">
+        SELECT COUNT(1)
+        FROM PODetail
+        WHERE order_no = #{orderNo}
+          AND site = #{site}
+          AND item = #{item}
+    </select>
+    
 </mapper>