diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/regdoctorstation/appservice/impl/RequestFormManageAppServiceImpl.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/regdoctorstation/appservice/impl/RequestFormManageAppServiceImpl.java
index 6948cd48d..2e09c86bc 100755
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/regdoctorstation/appservice/impl/RequestFormManageAppServiceImpl.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/regdoctorstation/appservice/impl/RequestFormManageAppServiceImpl.java
@@ -90,18 +90,26 @@ public class RequestFormManageAppServiceImpl implements IRequestFormManageAppSer
 
         // 逐个校验activityList中的项目是否都配置了执行科室，并收集positionId供后续使用
         // 必须在任何数据库操作之前完成全部校验，避免部分保存后异常导致脏数据
+        // 🔧 Bug #516: 优先使用前端传入的positionId（用户手动选择的发往科室），仅在未选择时使用配置的执行科室
         List<ActivitySaveDto> activityList = requestFormSaveDto.getActivityList();
         // 缓存校验结果，避免主循环中重复查询和可能出现的数据不一致
         java.util.Map<Long, Long> activityIdToPositionIdMap = new java.util.HashMap<>();
         if (activityList != null && !activityList.isEmpty()) {
             for (ActivitySaveDto activitySaveDto : activityList) {
-                Long positionId = activityOrganizationConfig.stream()
+                // 优先使用前端传入的positionId（用户手动选择的科室）
+                Long frontendPositionId = activitySaveDto.getPositionId();
+                if (frontendPositionId != null) {
+                    activityIdToPositionIdMap.put(activitySaveDto.getAdviceDefinitionId(), frontendPositionId);
+                    continue;
+                }
+                // 前端未传入时，使用配置的执行科室
+                Long configPositionId = activityOrganizationConfig.stream()
                     .filter(dto -> activitySaveDto.getAdviceDefinitionId().equals(dto.getActivityDefinitionId()))
                     .map(ActivityOrganizationConfigDto::getOrganizationId).findFirst().orElse(null);
-                if (positionId == null) {
+                if (configPositionId == null) {
                     throw new ServiceException(activitySaveDto.getAdviceDefinitionName() + "未配置当前时间段的执行科室");
                 }
-                activityIdToPositionIdMap.put(activitySaveDto.getAdviceDefinitionId(), positionId);
+                activityIdToPositionIdMap.put(activitySaveDto.getAdviceDefinitionId(), configPositionId);
             }
         }