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 8b2fc686..72cf3985 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
@@ -38,7 +38,7 @@ import java.util.stream.Collectors;
  * <ul>
  * <li>创建领料单复用 newSoIssueNotify 同一套表：SOIssueNotifyHeader / SOIssueNotifyOrderList / SOIssueNotifyOrderMaterialList</li>
  * <li>ERF试验单领料每次单独创建领料单，创建后默认状态=已下达，并写入单据类型标记</li>
- * <li>ERF领料创建时按原材料逐条落地：1条原材料对应1条SOIssueNotifyOrderList和1条SOIssueNotifyOrderMaterialList</li>
+ * <li>ERF领料按工序落地：同一试验单的同一工序只建1条SOIssueNotifyOrderList，该工序下每条原材料对应1条SOIssueNotifyOrderMaterialList，并共用同一个ItemNo</li>
  * </ul>
  *
  * @author System
@@ -197,19 +197,40 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
         String finalUserName = StringUtils.hasText(userName) ? userName : "system";
         String notifyNo = createErfNotifyNo(site, finalUserName, data.getRemark(), planIssueDate);
 
-        int createdOrderCount = 0;
-        int createdMaterialCount = 0;
+        // 同一试验单的同一工序只建一条工单行。按原材料逐条建会把同一工序拆成多条 SOIssueNotifyOrderList。
+        Map<String, List<ErfExpIssueMaterialData>> processGroupMap = new LinkedHashMap<>();
         for (ErfExpIssueMaterialData materialItem : validatedMaterialList) {
             if (materialItem == null || materialItem.getRawMaterialId() == null) {
                 continue;
             }
-            BigDecimal issueQty = safeDecimal(issueQtyMap.get(materialItem.getRawMaterialId()));
+            String groupKey = buildProcessGroupKey(materialItem);
+            List<ErfExpIssueMaterialData> groupList = processGroupMap.get(groupKey);
+            if (groupList == null) {
+                groupList = new ArrayList<>();
+                processGroupMap.put(groupKey, groupList);
+            }
+            groupList.add(materialItem);
+        }
+
+        int createdOrderCount = 0;
+        int createdMaterialCount = 0;
+        for (List<ErfExpIssueMaterialData> processMaterials : processGroupMap.values()) {
+            if (CollectionUtils.isEmpty(processMaterials)) {
+                continue;
+            }
+            ErfExpIssueMaterialData headerMaterial = processMaterials.get(0);
+            // 工单行领取数量是该工序下各原材料本次领料数量的合计，物料行仍各自保存自己的数量。
+            BigDecimal orderIssueQty = resolveProcessIssueQty(processMaterials, issueQtyMap);
 
-            SOIssueNotifyOrderList orderData = buildNotifyOrderList(notifyNo, site, materialItem, issueQty);
+            SOIssueNotifyOrderList orderData = buildNotifyOrderList(notifyNo, site, headerMaterial, orderIssueQty);
             Double itemNo = issureNotifyService.saveSOIssueNotifyOrderList(orderData);
 
-            List<SOIssueNotifyOrderMaterialListData> saveMaterialList =
-                    buildNotifyMaterialList(notifyNo, site, itemNo, materialItem, issueQty);
+            // saveMaterialDetail 会先按 ItemNo 删掉已有物料再整批插入，必须一次提交该工序的全部物料。
+            List<SOIssueNotifyOrderMaterialListData> saveMaterialList = new ArrayList<>();
+            for (ErfExpIssueMaterialData materialItem : processMaterials) {
+                BigDecimal issueQty = safeDecimal(issueQtyMap.get(materialItem.getRawMaterialId()));
+                saveMaterialList.addAll(buildNotifyMaterialList(notifyNo, site, itemNo, materialItem, issueQty));
+            }
             issureNotifyService.saveMaterialDetail(saveMaterialList);
 
             createdOrderCount++;
@@ -220,7 +241,7 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
             throw new XJException("未生成任何领料明细，请检查后重试");
         }
 
-        log.info("创建试验单领料单成功(复用SOIssueNotify表): notifyNo={}, 派工单条数={}, 物料条数={}, 操作人ID={}",
+        log.info("创建试验单领料单成功(复用SOIssueNotify表): notifyNo={}, 工序条数={}, 物料条数={}, 操作人ID={}",
                 notifyNo, createdOrderCount, createdMaterialCount, userId);
         return notifyNo;
     }
@@ -277,7 +298,37 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
     }
 
     /**
-     * 组装SOIssueNotifyOrderList（按原材料一条一建）
+     * 同一试验单、同一工序共用一条工单行。
+     * 不同试验单即使工序名称相同也不能合并，工单号和成品料号都按试验单取。
+     * 工序为空时按原材料拆开，避免未维护工序的物料被误合并。
+     */
+    private String buildProcessGroupKey(ErfExpIssueMaterialData materialItem) {
+        String applyNo = materialItem.getApplyNo() == null ? "" : materialItem.getApplyNo().trim();
+        String processStep = materialItem.getProcessStep() == null ? "" : materialItem.getProcessStep().trim();
+        if (!StringUtils.hasText(processStep)) {
+            return applyNo + "||__RM__||" + materialItem.getRawMaterialId();
+        }
+        return applyNo + "||" + processStep;
+    }
+
+    /**
+     * 工单行领取数量等于该工序下原材料本次领料数量之和。
+     * 物料行 QtyToIssue 仍按各自数量写入，不因为合并工单行而改掉单物料数量。
+     */
+    private BigDecimal resolveProcessIssueQty(List<ErfExpIssueMaterialData> processMaterials,
+                                              Map<Integer, BigDecimal> issueQtyMap) {
+        BigDecimal processIssueQty = BigDecimal.ZERO;
+        for (ErfExpIssueMaterialData materialItem : processMaterials) {
+            if (materialItem == null || materialItem.getRawMaterialId() == null) {
+                continue;
+            }
+            processIssueQty = processIssueQty.add(safeDecimal(issueQtyMap.get(materialItem.getRawMaterialId())));
+        }
+        return processIssueQty;
+    }
+
+    /**
+     * 组装SOIssueNotifyOrderList（按工序一条一建）
      */
     private SOIssueNotifyOrderList buildNotifyOrderList(String notifyNo,
                                                         String site,
@@ -303,7 +354,7 @@ public class ErfExpIssueServiceImpl implements ErfExpIssueService {
     }
 
     /**
-     * 组装SOIssueNotifyOrderMaterialList（按原材料一条一建）
+     * 组装SOIssueNotifyOrderMaterialList（同一工序下每条原材料一行，ItemNo 与工单行一致）
      */
     private List<SOIssueNotifyOrderMaterialListData> buildNotifyMaterialList(String notifyNo,
                                                                               String site,