diff --git a/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpApplyMapper.java b/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpApplyMapper.java
index 5a6e96c1..deef8aa7 100644
--- a/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpApplyMapper.java
+++ b/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpApplyMapper.java
@@ -111,4 +111,14 @@ public interface ErfExpApplyMapper extends BaseMapper<ErfExpApply> {
      */
     int copyAttachment(@Param("attachment") Map<String, Object> attachment,
                       @Param("targetApplyNo") String targetApplyNo);
+
+    /**
+     * 更新申请单附件的工单号（order_ref3字段）
+     *
+     * @param applyNo      申请单号
+     * @param workOrderNo  工单号
+     * @return 更新记录数
+     */
+    int updateAttachmentWorkOrderNo(@Param("applyNo") String applyNo,
+                                   @Param("workOrderNo") String workOrderNo);
 }
diff --git a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
index f3f6d862..f17a68f7 100644
--- a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpApplyServiceImpl.java
@@ -11,6 +11,7 @@ import com.xujie.sys.common.utils.PageUtils;
 import com.xujie.sys.modules.erf.data.ErfExpApplyData;
 import com.xujie.sys.modules.erf.data.ErfFlowApprovalData;
 import com.xujie.sys.modules.erf.data.ErfFlowStatusData;
+import com.xujie.sys.modules.erf.data.ErfPlannerScheduleData;
 import com.xujie.sys.modules.erf.entity.*;
 import com.xujie.sys.modules.erf.mapper.*;
 import com.xujie.sys.modules.erf.service.ErfExpApplyService;
@@ -479,7 +480,7 @@ public class ErfExpApplyServiceImpl extends ServiceImpl<ErfExpApplyMapper, ErfEx
     }
 
     @Override
-    public void plannerSchedule(com.xujie.sys.modules.erf.data.ErfPlannerScheduleData data) {
+    public void plannerSchedule(ErfPlannerScheduleData data) {
         log.info("=== 计划员排产 === 申请单: {}, 工单号: {}, 排产日期: {}",
             data.getApplyNo(), data.getWorkOrderNo(), data.getScheduledDate());
 
@@ -495,6 +496,11 @@ public class ErfExpApplyServiceImpl extends ServiceImpl<ErfExpApplyMapper, ErfEx
         entity.setPlannerName(data.getPlannerName());
         this.updateById(entity);
 
+        // 同步将工单号更新到申请单附件的 order_ref3 字段
+        int ossUpdated = erfExpApplyMapper.updateAttachmentWorkOrderNo(data.getApplyNo(), data.getWorkOrderNo());
+        log.info("同步更新附件工单号: applyNo={}, workOrderNo={}, 更新附件数={}",
+            data.getApplyNo(), data.getWorkOrderNo(), ossUpdated);
+
         // 如果是High Risk，初始化三方确认记录
         if ("High Risk".equals(entity.getExperimentType()) &&
             data.getProcessSteps() != null && !data.getProcessSteps().isEmpty()) {
diff --git a/src/main/resources/mapper/erf/ErfExpApplyMapper.xml b/src/main/resources/mapper/erf/ErfExpApplyMapper.xml
index 6cb091a1..4cc22309 100644
--- a/src/main/resources/mapper/erf/ErfExpApplyMapper.xml
+++ b/src/main/resources/mapper/erf/ErfExpApplyMapper.xml
@@ -428,6 +428,15 @@
         ORDER BY a.submit_time DESC
     </select>
 
+    <!-- 更新附件工单号 -->
+    <update id="updateAttachmentWorkOrderNo">
+        UPDATE sys_oss
+        SET order_ref3 = #{workOrderNo}
+        WHERE order_ref1 = 'ERF'
+          AND order_ref2 = #{applyNo}
+          AND order_ref6 = 'EXP_APPLY'
+    </update>
+
     <!-- 复制附件 -->
     <insert id="copyAttachment">
         INSERT INTO sys_oss