diff --git a/lastleg-service/docs/procurement-direction.md b/lastleg-service/docs/procurement-direction.md
index 9d1dbea0b..1066c3d71 100644
--- a/lastleg-service/docs/procurement-direction.md
+++ b/lastleg-service/docs/procurement-direction.md
@@ -2,7 +2,7 @@
 
 2026-10-26 按用户要求增加国内采购发往海外，保留海外采购回国内。
 
-- `procurementDirection` 为 `OVERSEAS_TO_DOMESTIC` 或 `DOMESTIC_TO_OVERSEAS`，不传时保持历史进口方向。客户建单可选；待审核且无购买、收货事实时平台可核定方向，审核通过后不再通过通用编辑修改方向。
+- `procurementDirection` 为 `OVERSEAS_TO_DOMESTIC` 或 `DOMESTIC_TO_OVERSEAS`，不传时保持历史进口方向。客户建单可选；平台审核仅展示客户下单方向，不允许审核改向；采购仓按该方向筛选。审核底部直接取消、拒绝或通过，拒绝必须填写具体原因。
 - 起运收货仓按方向读取 Warehouse 权威公共启用仓目录，国内方向只接受 DOMESTIC，进口方向保持海外 RECEIVING 能力约束。实际收货、计划仓更改、实际仓更正及面单寄件地址均校验同一方向。
 - 出口流程：审核 → 国内购买 → 国内分次实收并确认 → 装箱 → 国际面单、预估运费冻结、贴单 → 国内国际交寄 → 海外分次实收并确认 → 海外核定实际费用 → 寄海外客户。正常终态仍为 SHIPPED_TO_CUSTOMER，取消、拒绝、异常关闭规则保留。
 - 此次沿用单商品、一次购买、两段各整批交寄及 Admin 台账，不新增 WMS 库存、PDA 入账、分批购买或分批交寄。目的地接收地址沿用国际面单地址快照，最终客户地址由下单提供，最终面单变更仍需客户凭证。
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java b/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
index 2075a6ebd..8894c6e1c 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
@@ -234,8 +234,11 @@ public class OverseasProcurementService {
         if (!PENDING_REVIEW.equals(order.getStatus())) throw conflict("Overseas procurement order was already reviewed");
         String direction = request.procurementDirection() == null ? ProcurementDirection.normalize(order.getProcurementDirection())
             : ProcurementDirection.normalize(request.procurementDirection());
-        if (!direction.equals(ProcurementDirection.normalize(order.getProcurementDirection())) && directionRepository.hasStarted(order.getId())) {
-            throw conflict("本单已有购买或收货事实，不能切换采购方向");
+        if (!direction.equals(ProcurementDirection.normalize(order.getProcurementDirection()))) {
+            throw conflict("审核不能修改采购方向，请按客户下单方向选择采购仓");
+        }
+        if (REJECTED.equals(next) && trim(request.remark()) == null) {
+            throw badRequest("请填写拒绝原因");
         }
         Map<String, Object> before = reviewSnapshot(order);
         if (WAIT_PURCHASE.equals(next)) {
diff --git a/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml b/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
index e23c85b8b..9e3ca0c81 100644
--- a/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
+++ b/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
@@ -5055,7 +5055,7 @@ components:
     ProcurementReview:
       type: object
       required: [version, decision, idempotencyKey]
-      description: 审核通过必须选择与采购方向匹配的有效公共收货仓；国内采购选择国内仓，海外采购选择海外收货仓；拒绝不要求仓库。已有购买或收货事实不得切换方向。
+      description: 审核通过必须选择与采购方向匹配的有效公共收货仓；国内采购选择国内仓，海外采购选择海外收货仓；拒绝不要求仓库，但 remark 必须填写非空白拒绝原因。审核不得修改客户下单采购方向。
       properties:
         procurementDirection: { $ref: '#/components/schemas/ProcurementDirection' }
         version: { type: integer, format: int64, minimum: 0 }
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
index 8d52bdc3d..bb02ba618 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
@@ -195,6 +195,7 @@ class OverseasProcurementServiceTest {
 
     @Test void exportReviewPersistsDirectionAndCannotReplayWithChangedDirection() {
         var order = order(OverseasProcurementService.PENDING_REVIEW,0,0);
+        order.setProcurementDirection(ProcurementDirection.EXPORT);
         when(orders.lockNo("100","HC1")).thenReturn(order);
         when(orders.findNo("100","HC1")).thenReturn(order);
         when(histories.listOrder("100",1L)).thenReturn(List.of());
@@ -221,7 +222,7 @@ class OverseasProcurementServiceTest {
     @Test void pendingReviewCannotReverseDirectionOfAnAlreadyRecordedPurchase() {
         var order = order(OverseasProcurementService.PENDING_REVIEW,0,0);
         when(orders.lockNo("100","HC1")).thenReturn(order);
-        when(directionRepository.hasStarted(1L)).thenReturn(true);
+
         assertThrows(ResponseStatusException.class, () -> service.review("100","HC1","7",
             new OverseasProcurementRequests.Review(0L,"APPROVE","export-after-purchase","checked",10L,ProcurementDirection.EXPORT)));
         verify(warehouseDirectory,never()).required(10L,ProcurementDirection.EXPORT);
@@ -239,4 +240,30 @@ class OverseasProcurementServiceTest {
         assertEquals("US, California, test destination",detail.receivingAddress());
         assertEquals(OverseasProcurementService.PENDING_REVIEW,detail.summary().status());
     }
+
+    @Test void rejectionRequiresSpecificNonblankReasonWithoutAWarehouse() {
+        var order = order(OverseasProcurementService.PENDING_REVIEW,0,0);
+        when(orders.lockNo("100","HC1")).thenReturn(order);
+        for (String reason : new String[]{null,"","   "}) {
+            var error = assertThrows(ResponseStatusException.class, () -> service.review("100","HC1","7",
+                new OverseasProcurementRequests.Review(0L,"REJECT","reject-empty",reason,null)));
+            assertEquals("请填写拒绝原因",error.getReason());
+        }
+        assertEquals(OverseasProcurementService.PENDING_REVIEW,order.getStatus());
+        when(orders.findNo("100","HC1")).thenReturn(order);
+        when(histories.listOrder("100",1L)).thenReturn(List.of());
+        var result=service.review("100","HC1","7",new OverseasProcurementRequests.Review(0L,"REJECT","reject-reason","供应商无法供货",null));
+        assertEquals(OverseasProcurementService.REJECTED,result.summary().status());
+        assertEquals("供应商无法供货",result.reviewRemark());
+        verify(warehouseDirectory,never()).required(10L);
+    }
+    @Test void reviewCannotChangeDirectionEvenBeforePurchase() {
+        var order = order(OverseasProcurementService.PENDING_REVIEW,0,0);
+        order.setProcurementDirection(ProcurementDirection.EXPORT);
+        when(orders.lockNo("100","HC1")).thenReturn(order);
+        var error=assertThrows(ResponseStatusException.class, () -> service.review("100","HC1","7",
+            new OverseasProcurementRequests.Review(0L,"APPROVE","change-direction","checked",10L,ProcurementDirection.IMPORT)));
+        assertEquals("审核不能修改采购方向，请按客户下单方向选择采购仓",error.getReason());
+        assertEquals(ProcurementDirection.EXPORT,order.getProcurementDirection());
+    }
 }