diff --git a/src/main/resources/mapper/ecss/CoDelMapper.xml b/src/main/resources/mapper/ecss/CoDelMapper.xml
index 367058d1..c6919319 100644
--- a/src/main/resources/mapper/ecss/CoDelMapper.xml
+++ b/src/main/resources/mapper/ecss/CoDelMapper.xml
@@ -263,7 +263,7 @@
         lt=#{lt,jdbcType=DECIMAL},cmc_comment=#{cmcComment},saleType=#{saleType},pn=#{pn},
         awb_bl=#{awbBl},shipping_number=#{shippingNumber},forwarder_info=#{forwarderInfo},currency=#{currency},
         tp=#{tp,jdbcType=DECIMAL},ttl_amount=#{ttlAmount,jdbcType=DECIMAL},sum_price=#{sumPrice,jdbcType=DECIMAL},
-        so=#{so},upc=#{upc},remark=#{remark},modifyFlag=#{modifyFlag},modifyQtyFlag=#{modifyQtyFlag},surplus_qty=#{qty},vat=#{vat},roll=#{roll},carton=#{carton}
+        so=#{so},upc=#{upc},remark=#{remark},modifyFlag=#{modifyFlag},modifyQtyFlag=#{modifyQtyFlag},surplus_qty=#{qty,jdbcType=DECIMAL},vat=#{vat},roll=#{roll},carton=#{carton}
         where
         site=#{site} and delNo=#{delNo} and item_no=#{itemNo}
     </update>
@@ -547,45 +547,45 @@ create_by,create_date,update_by,update_date
     </select>
 
     <select id="getDefaultEcssDeclarationDetailData" resultType="EcssDeclarationDetailData">
-        -- 修复重复计算净重的问题：使用子查询先计算每个hsCode的数量和总净重，然后按比例分配
-        WITH HsCodeQty AS (
-            -- 先计算每个hsCode的总数量
-            SELECT b.hsCode, b.hsCodeDesc, SUM(a.qty) as totalQty
-            FROM ecss_CoDelPalletDetail a
-            LEFT JOIN part b ON a.site=b.site AND a.part_no=b.part_no
-            WHERE a.site=#{site} AND a.delNo=#{delNo} AND a.bu_no=#{buNo}
-            GROUP BY b.hsCode, b.hsCodeDesc
-        ),
-        TotalWeight AS (
-            -- 计算总净重（不重复）
-            SELECT SUM(net_weight) as totalNetWeight
-            FROM ecss_CoDelBoxList
-            WHERE site=#{site} AND delNo=#{delNo} AND bu_no=#{buNo}
-        ),
-        TotalQty AS (
-            -- 计算总数量
-            SELECT SUM(qty) as allQty
-            FROM ecss_CoDelPalletDetail
-            WHERE site=#{site} AND delNo=#{delNo} AND bu_no=#{buNo}
+        -- 修复净重计算问题：按数量比例分配箱子净重，避免重复计算
+        -- 一个箱子(BoxList)可能包含多个零件(PalletDetail)，这些零件可能有相同的hsCode
+        -- 需要按每个零件的数量占该箱子总数量的比例来分配净重
+        WITH BoxDetail AS (
+            -- 计算每个箱子中每个零件的数量及其占比
+            SELECT
+                d.site,
+                d.bu_no,
+                d.delNo,
+                d.seq_no,
+                p.hsCode,
+                p.hsCodeDesc,
+                d.qty,
+                b.net_weight,
+                -- 计算该零件数量占该箱子总数量的比例
+                CASE
+                    WHEN SUM(d.qty) OVER (PARTITION BY d.site, d.bu_no, d.delNo, d.seq_no) > 0
+                    THEN d.qty * 1.0 / SUM(d.qty) OVER (PARTITION BY d.site, d.bu_no, d.delNo, d.seq_no)
+                    ELSE 0
+                END as qtyRatio
+            FROM ecss_CoDelPalletDetail d
+            LEFT JOIN part p ON d.site=p.site AND d.part_no=p.part_no
+            LEFT JOIN ecss_CoDelBoxList b ON d.site=b.site AND d.bu_no=b.bu_no AND d.delNo=b.delNo AND d.seq_no=b.item_no
+            WHERE d.site=#{site} AND d.delNo=#{delNo} AND d.bu_no=#{buNo}
         )
-        SELECT 
+        SELECT
             #{site} as site,
-            h.hsCode,
-            h.hsCodeDesc,
-            h.totalQty as qty,
-            -- 按数量比例分配净重：(该hsCode的数量 / 总数量) * 总净重
-            CASE 
-                WHEN tq.allQty > 0 THEN CONVERT(DECIMAL(20,2), (h.totalQty * tw.totalNetWeight) / tq.allQty)
-                ELSE 0
-            END as NetWeight,
+            hsCode,
+            hsCodeDesc,
+            SUM(qty) as qty,
+            -- 按数量比例分配净重后汇总
+            CONVERT(DECIMAL(20,2), SUM(ISNULL(net_weight, 0) * qtyRatio)) as NetWeight,
             'CNY' as currency,
             '中国' as madeArea,
             #{destination} as destination,
             '南通其他' as sourceArea,
             '照章征免' as levy
-        FROM HsCodeQty h
-        CROSS JOIN TotalWeight tw
-        CROSS JOIN TotalQty tq
+        FROM BoxDetail
+        GROUP BY hsCode, hsCodeDesc
     </select>
 
     <select id="getDefaultEcssDeclarationDetailData2" resultType="EcssDeclarationDetailData">