diff --git a/order/src/main/java/com/baiyue/order/service/UnifiedOrderQueryService.java b/order/src/main/java/com/baiyue/order/service/UnifiedOrderQueryService.java
index d62472c54..bacfda9e7 100644
--- a/order/src/main/java/com/baiyue/order/service/UnifiedOrderQueryService.java
+++ b/order/src/main/java/com/baiyue/order/service/UnifiedOrderQueryService.java
@@ -110,7 +110,7 @@ public class UnifiedOrderQueryService {
                                                 boolean includeCoLoadGroups) {
         OrderEntity order = orders.findOwned(tenantId, orderId);
         if (order == null) throw new BizException(ResultCode.NOT_FOUND, "订单不存在");
-        OrderDetailResponse orderDetail = new OrderDetailResponse(order, orders.findCargo(tenantId, orderId),
+        OrderDetailResponse orderDetail = new OrderDetailResponse(order, orders.findCargoInheritedByOrder(tenantId, orderId),
             orders.findParties(tenantId, orderId), includeInternalNotes ? orders.findNotes(tenantId, orderId) : List.of(),
             orders.findHistory(tenantId, orderId));
         FirstlegUnifiedOrderClient.Detail inbound = order.getStatus() == OrderStatus.SUBMITTED
diff --git a/order/src/test/java/com/baiyue/order/service/UnifiedOrderQueryServiceTest.java b/order/src/test/java/com/baiyue/order/service/UnifiedOrderQueryServiceTest.java
index 685449005..106ff2e31 100644
--- a/order/src/test/java/com/baiyue/order/service/UnifiedOrderQueryServiceTest.java
+++ b/order/src/test/java/com/baiyue/order/service/UnifiedOrderQueryServiceTest.java
@@ -497,6 +497,31 @@ class UnifiedOrderQueryServiceTest {
         verify(firstleg).detail(eq("internal-token"), any());
     }
 
+    @Test
+    void childDetailInheritsCargoFromRootOrderWhenItHasNoOwnCargo() {
+        OrderEntity child = order(OrderStatus.SUBMITTED);
+        child.setId(78L);
+        child.setOrderNo("FL-77-1");
+        child.setOrderRole("CHILD");
+        child.setRootOrderId(77L);
+        OrderCargoEntity inheritedCargo = new OrderCargoEntity();
+        inheritedCargo.setId(901L);
+        inheritedCargo.setOrderId(77L);
+        inheritedCargo.setSkuNo("SKU-ROOT");
+        when(orders.findOwned(10001L, 78L)).thenReturn(child);
+        when(orders.findCargoInheritedByOrder(10001L, 78L)).thenReturn(List.of(inheritedCargo));
+        when(orders.findParties(10001L, 78L)).thenReturn(List.of());
+        when(orders.findHistory(10001L, 78L)).thenReturn(List.of());
+
+        var result = service.detail(10001L, 78L, false);
+
+        assertThat(result.order().cargoes()).singleElement().satisfies(cargo -> {
+            assertThat(cargo.getId()).isEqualTo(901L);
+            assertThat(cargo.getSkuNo()).isEqualTo("SKU-ROOT");
+        });
+        verify(orders).findCargoInheritedByOrder(10001L, 78L);
+    }
+
     @Test
     void detailUsesCreateHistoryOperatorNameInsteadOfNumericCreatorId() {
         OrderEntity order = order(OrderStatus.SUBMITTED);