diff --git a/ruoyi-admin/src/main/java/com/ruoyi/purchase/service/impl/PurchaseOrderServiceImpl.java b/ruoyi-admin/src/main/java/com/ruoyi/purchase/service/impl/PurchaseOrderServiceImpl.java
index cce085b0..f8a2c758 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/purchase/service/impl/PurchaseOrderServiceImpl.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/purchase/service/impl/PurchaseOrderServiceImpl.java
@@ -449,51 +449,62 @@ public class PurchaseOrderServiceImpl implements IPurchaseOrderService
             // 获取旧数据中相同物料编号的数据
             List<PurchasePlanChild> oldChildren = oldDataGroupedByMaterialNo.get(materialNo);
 
-            if (oldChildren != null && !oldChildren.isEmpty()) {
-                // 按照 订单创建时间 远离当前时间排序
-                oldChildren.sort(Comparator.comparing(oldChild -> -Math.abs(now.getTime() - oldChild.getCreateTime().getTime())));
+            Integer thisPurchaseNum = purchasePlanSelectMaterialVo.getThisPurchaseNum();
 
-            for (PurchasePlanChild oldChild : oldChildren) {
+            int oldPurchaseNumSum = oldChildren.stream().mapToInt(PurchasePlanChild::getPurchaseNum).sum();
 
-            Integer thisPurchaseNum = purchasePlanSelectMaterialVo.getThisPurchaseNum();
-            //本次采购数也是实际采购数
-            oldChild.setActualPurchaseNum(thisPurchaseNum);
-            //待采购数
-            Integer purchaseNum = oldChild.getPurchaseNum();
-            if (purchaseNum >= thisPurchaseNum){
-                purchaseNum = purchaseNum - thisPurchaseNum;
-                oldChild.setPurchaseNum(purchaseNum);
-            }else {
+            if (oldPurchaseNumSum < thisPurchaseNum){
                 throw new BusinessException("本次采购数量不能大于待采购数量");
             }
 
+            if (!CollectionUtils.isEmpty(oldChildren)) {
+                // 按照订单创建时间远离当前时间排序（即由远及近）
+                oldChildren.sort(Comparator.comparing(oldChild -> oldChild.getCreateTime().getTime()));
+
+            for (PurchasePlanChild oldChild : oldChildren) {
+
+                Integer purchaseNum = oldChild.getPurchaseNum();
+
+                if (thisPurchaseNum <= 0) break;  // 如果本次采购数已分配完毕则退出循环
+
+                if (purchaseNum >= thisPurchaseNum) {
+                    // 当前记录的待采购数足够覆盖剩余的本次采购数
+                    oldChild.setActualPurchaseNum(thisPurchaseNum);
+                    oldChild.setPurchaseNum(purchaseNum - thisPurchaseNum);
+                    thisPurchaseNum = 0;  // 本次采购数分配完毕
+                } else {
+                    // 当前记录的待采购数不足以覆盖剩余的本次采购数
+                    oldChild.setActualPurchaseNum(purchaseNum);
+                    thisPurchaseNum -= purchaseNum;
+                    oldChild.setPurchaseNum(0);  // 该记录的待采购数清零
+                }
+
             /*
             * 部分申请:0<(实际采购数+共享库存占用数+作废数)<计划采购数;可添加采购订单
             * 全部申请:0<(实际采购数+共享库存占用数+作废数)=计划采购数，作废数<计划采购数;不可添加采购订单
             * */
-            //计划采购数
-            Integer planPurchaseNum = oldChild.getPlanPurchaseNum();
-            if (thisPurchaseNum < planPurchaseNum){
-                oldChild.setPurchasePlanStatus("1");//部分申请
-            }
-            if (thisPurchaseNum.equals(planPurchaseNum)){
-                oldChild.setPurchasePlanStatus("2");//全部申请
-            }
-                 oldChild.setUpdateTime(new Date());
-                 oldChild.setUpdateBy(ShiroUtils.getLoginName());
-                oldChild.setThisPurchaseNum(thisPurchaseNum);
+                // 更新状态
+                Integer planPurchaseNum = oldChild.getPlanPurchaseNum();
+                if (oldChild.getActualPurchaseNum().equals(planPurchaseNum)) {
+                    oldChild.setPurchasePlanStatus("2"); // 全部申请
+                } else {
+                    oldChild.setPurchasePlanStatus("1"); // 部分申请
+                }
 
+                // 更新其他字段
+                oldChild.setUpdateTime(new Date());
+                oldChild.setUpdateBy(ShiroUtils.getLoginName());
+                oldChild.setThisPurchaseNum(purchasePlanSelectMaterialVo.getThisPurchaseNum());
                 oldChild.setMaterialNoRmbSum(purchasePlanSelectMaterialVo.getMaterialNoRmbSum());
                 oldChild.setMaterialRmbSum(purchasePlanSelectMaterialVo.getMaterialRmbSum());
                 oldChild.setLatestQuoteRmb(purchasePlanSelectMaterialVo.getLatestQuoteRmb());
-                 //收集更新后的子表数据
-                 purchasePlanChildren.add(oldChild);
+                oldChild.setThisPurchaseNum(thisPurchaseNum);
+                // 收集更新后的子表数据
+                purchasePlanChildren.add(oldChild);
             int result = purchasePlanChildMapper.updatePurchasePlanChild(oldChild);
             if (result <= 0){
                 throw new BusinessException("更新采购计划子表数据失败");
             }
-                    // 更新完成后，跳出循环
-                    break;
                 }
             }
         }
@@ -544,14 +555,14 @@ public class PurchaseOrderServiceImpl implements IPurchaseOrderService
                 }
 
                 // 累加 actualPurchaseSum
-                int thisPurchaseSum = children.stream()
-                        .mapToInt(PurchasePlanChild::getThisPurchaseNum)
+                int actualPurchaseSum = children.stream()
+                        .mapToInt(PurchasePlanChild::getActualPurchaseNum)
                         .sum();
-                purchasePlan.setActualPurchaseSum(purchasePlan.getActualPurchaseSum() + thisPurchaseSum);
+                purchasePlan.setActualPurchaseSum(purchasePlan.getActualPurchaseSum() + actualPurchaseSum);
 
                 // 更新 purchaseSum
                 int currentPurchaseSum = purchasePlan.getPurchaseSum();
-                purchasePlan.setPurchaseSum(currentPurchaseSum - thisPurchaseSum);
+                purchasePlan.setPurchaseSum(currentPurchaseSum - actualPurchaseSum);
 
                 // 计算合计值
                 double totalNoRmbSum = children.stream().mapToDouble(vo -> vo.getMaterialNoRmbSum().doubleValue()).sum();
diff --git a/ruoyi-admin/src/main/resources/mapper/system/SysSupplierMapper.xml b/ruoyi-admin/src/main/resources/mapper/system/SysSupplierMapper.xml
index 2045cac0..6c8f5299 100644
--- a/ruoyi-admin/src/main/resources/mapper/system/SysSupplierMapper.xml
+++ b/ruoyi-admin/src/main/resources/mapper/system/SysSupplierMapper.xml
@@ -131,7 +131,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="invoiceCompanyName != null and invoiceCompanyName != ''"> and sup.invoice_company_name like concat('%', #{invoiceCompanyName}, '%')</if>
             <if test="companyTaxNumber != null and companyTaxNumber != ''"> and sup.company_tax_number like concat('%', #{companyTaxNumber}, '%')</if>
         </where>
-        order by sup.apply_time asc, sup.create_time desc
+        order by sup.create_time desc
     </select>
     <select id="selectSysSupplierById" parameterType="Long" resultMap="SysSupplierResult">
         select sup.supplier_id, sup.supplier_code, sup.supplier_name, sup.export_sales,