diff --git a/emis-biz/src/main/java/com/xdadan/erp/emis/service/EmisBaseService.java b/emis-biz/src/main/java/com/xdadan/erp/emis/service/EmisBaseService.java
index a196e759a..49ec8a6ba 100644
--- a/emis-biz/src/main/java/com/xdadan/erp/emis/service/EmisBaseService.java
+++ b/emis-biz/src/main/java/com/xdadan/erp/emis/service/EmisBaseService.java
@@ -4501,7 +4501,7 @@ public class EmisBaseService {
      }
 
      public EmisBaseService.ProcessResult processWaybillBatch(List<EmisWaybill> waybills,
-                                                               Map<String, List<EmisTransPlanRule>> transPlanRulesByLineCode) {
+                                                              Map<String, List<EmisTransPlanRule>> transPlanRulesByLineCode) {
          int successCount = 0;
          int failCount = 0;
          List<String> failedBillCodes = new ArrayList<>();
@@ -4585,13 +4585,29 @@ public class EmisBaseService {
                      String key = batch.getStartSiteCode() + "_" + batch.getNextSiteCode();
                      if (mergedBatches.containsKey(key)) {
                          EmisTmsSiteBatch existingBatch = mergedBatches.get(key);
-                         String existingSupplier = existingBatch.getSupplierCode();
-                         String newSupplier = batch.getSupplierCode();
-                         if (!existingSupplier.equals(newSupplier)) {
-                             existingBatch.setSupplierCode(existingSupplier + "," + newSupplier);
+                         // 合并supplierCode，去重、排序
+                         Set<String> supplierSet = new TreeSet<>();
+                         if (StringUtils.isNotBlank(existingBatch.getSupplierCode())) {
+                             supplierSet.addAll(Arrays.asList(existingBatch.getSupplierCode().split(",")));
                          }
+                         if (StringUtils.isNotBlank(batch.getSupplierCode())) {
+                             supplierSet.addAll(Arrays.asList(batch.getSupplierCode().split(",")));
+                         }
+                         // 新建一个新的Batch对象，复制属性，保证线程安全
+                         EmisTmsSiteBatch newBatch = new EmisTmsSiteBatch();
+                         BeanUtils.copyProperties(existingBatch, newBatch);
+                         newBatch.setSupplierCode(String.join(",", supplierSet));
+                         mergedBatches.put(key, newBatch);
                      } else {
-                         mergedBatches.put(key, batch);
+                         // 新建对象，避免外部引用被修改
+                         EmisTmsSiteBatch newBatch = new EmisTmsSiteBatch();
+                         BeanUtils.copyProperties(batch, newBatch);
+                         Set<String> supplierSet = new TreeSet<>();
+                         if (StringUtils.isNotBlank(batch.getSupplierCode())) {
+                             supplierSet.addAll(Arrays.asList(batch.getSupplierCode().split(",")));
+                         }
+                         newBatch.setSupplierCode(String.join(",", supplierSet));
+                         mergedBatches.put(key, newBatch);
                      }
                  }
                  waybillBatches = new ArrayList<>(mergedBatches.values());