diff --git a/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpIssueMapper.java b/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpIssueMapper.java
index 845fd511..a72047b7 100644
--- a/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpIssueMapper.java
+++ b/src/main/java/com/xujie/sys/modules/erf/mapper/ErfExpIssueMapper.java
@@ -31,4 +31,12 @@ public interface ErfExpIssueMapper {
      */
     List<ErfExpIssueMaterialData> getIssueMaterialByRawMaterialIds(@Param("rawMaterialIdList") List<Integer> rawMaterialIdList);
 
+    /**
+     * 根据工单号查询shoporder中的成品料号（仅已下达且样品工单）
+     */
+    String getShopOrderPartNo(@Param("site") String site,
+                              @Param("orderNo") String orderNo,
+                              @Param("status") String status,
+                              @Param("orderType") String orderType);
+
 }
diff --git a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpIssueServiceImpl.java b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpIssueServiceImpl.java
index 7514981b..cd687c50 100644
--- a/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpIssueServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/erf/service/impl/ErfExpIssueServiceImpl.java
@@ -52,6 +52,9 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
     private static final String ERF_COMPONENT_PREFIX = "ERF-RM-";
     private static final String ERF_NOTIFY_ORDER_TYPE = "样品工单";
     private static final String ERF_NOTIFY_DEFAULT_REMARK = "样品工单";
+    private static final String ERF_SO_ORDER_NO_SUFFIX = "#1";
+    private static final String SHOP_ORDER_RELEASED_STATUS = "下达";
+    private static final String DEFAULT_FG_PART_NO = "*";
 
     @Autowired
     private ErfExpIssueMapper erfExpIssueMapper;
@@ -279,11 +282,14 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
         orderData.setOutWorkOrderFlag("N");
 
         // ERF来源数据映射到SOIssueNotify结构
-        orderData.setSeqNo(StringUtils.hasText(materialItem.getApplyNo()) ? materialItem.getApplyNo().trim() : "");
-        orderData.setsOOrderNo(StringUtils.hasText(materialItem.getApplyNo()) ? materialItem.getApplyNo().trim() : "");
+        String applyNo = StringUtils.hasText(materialItem.getApplyNo()) ? materialItem.getApplyNo().trim() : "";
+        orderData.setSeqNo(applyNo);
+        // SOIssueNotifyOrderList约定SOOrderNo需追加后缀，用于区分同源工单序号
+        String soOrderNo = StringUtils.hasText(applyNo) ? applyNo + ERF_SO_ORDER_NO_SUFFIX : "";
+        orderData.setsOOrderNo(soOrderNo);
         orderData.setOpsItemNo(0D);
         orderData.setOpsDesc(StringUtils.hasText(materialItem.getProcessStep()) ? materialItem.getProcessStep().trim() : "");
-        orderData.setfGPartNo(resolveFgPartNo(materialItem));
+        orderData.setfGPartNo(resolveFgPartNo(site, soOrderNo));
         orderData.setNeedDate(resolveNeedDate(materialItem));
         return orderData;
     }
@@ -322,14 +328,16 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
         return ERF_COMPONENT_PREFIX + (item != null ? item.getRawMaterialId() : "");
     }
 
-    private String resolveFgPartNo(ErfExpIssueMaterialData materialItem) {
-        if (materialItem != null && StringUtils.hasText(materialItem.getPartNo())) {
-            return materialItem.getPartNo().trim();
+    private String resolveFgPartNo(String site, String soOrderNo) {
+        if (!StringUtils.hasText(site) || !StringUtils.hasText(soOrderNo)) {
+            return DEFAULT_FG_PART_NO;
         }
-        if (materialItem != null && StringUtils.hasText(materialItem.getApplyNo())) {
-            return materialItem.getApplyNo().trim();
+        // 业务要求：FG料号以shoporder中“已下达+样品工单+匹配工单号”的partno为准，不存在时统一落"*"
+        String shopOrderPartNo = erfExpIssueMapper.getShopOrderPartNo(site, soOrderNo, SHOP_ORDER_RELEASED_STATUS, ERF_NOTIFY_ORDER_TYPE);
+        if (shopOrderPartNo != null) {
+            return shopOrderPartNo.trim();
         }
-        return "";
+        return DEFAULT_FG_PART_NO;
     }
 
 
diff --git a/src/main/resources/mapper/erf/ErfExpIssueMapper.xml b/src/main/resources/mapper/erf/ErfExpIssueMapper.xml
index e5c6f279..e1302449 100644
--- a/src/main/resources/mapper/erf/ErfExpIssueMapper.xml
+++ b/src/main/resources/mapper/erf/ErfExpIssueMapper.xml
@@ -162,4 +162,15 @@
           </foreach>
     </select>
 
+    <!-- 根据SOOrderNo回查shoporder成品料号，仅取已下达+样品工单 -->
+    <select id="getShopOrderPartNo" resultType="string">
+        SELECT TOP 1
+            ISNULL(s.partno, '')
+        FROM shoporder s
+        WHERE s.site = #{site}
+          AND s.status = #{status}
+          AND ISNULL(s.ordertype, '') = #{orderType}
+          AND s.orderno = #{orderNo}
+    </select>
+
 </mapper>