diff --git a/src/main/java/com/xujie/sys/modules/ecss/controller/CoDelController.java b/src/main/java/com/xujie/sys/modules/ecss/controller/CoDelController.java
index 3231bdd0..5131351d 100644
--- a/src/main/java/com/xujie/sys/modules/ecss/controller/CoDelController.java
+++ b/src/main/java/com/xujie/sys/modules/ecss/controller/CoDelController.java
@@ -122,6 +122,23 @@ public class CoDelController {
         return R.ok();
     }
 
+    @PostMapping("/modifyNotifyDetailByExcelTX")
+    public R modifyNotifyDetailByExcelTX(@RequestParam(value = "file") MultipartFile file,
+                                         @ModelAttribute EcssCoDelNotifyHeaderData data,
+                                         HttpServletRequest request){
+        try {
+            Map<String, List<String>> resultMap = coDelExcelTXService.modifyNotifyDetailByExcelTX(file, data, request);
+            List<String> failList = resultMap.get("fail");
+            if (failList != null && !failList.isEmpty()) {
+                return R.error(String.join("\n", failList));
+            }
+            return R.ok("改单导入成功").put("resultMap", resultMap);
+        } catch (Exception e) {
+            log.error("TX改单导入失败", e);
+            return R.error(e.getMessage());
+        }
+    }
+
     @PostMapping("/updateEcssDelHeader")
     public R updateEcssDelHeader(@RequestBody EcssCoDelNotifyHeaderData data) {
         coDelService.updateEcssDelHeader(data);
diff --git a/src/main/java/com/xujie/sys/modules/ecss/service/CoDelExcelTXService.java b/src/main/java/com/xujie/sys/modules/ecss/service/CoDelExcelTXService.java
index 5f3b46e7..5aca378d 100644
--- a/src/main/java/com/xujie/sys/modules/ecss/service/CoDelExcelTXService.java
+++ b/src/main/java/com/xujie/sys/modules/ecss/service/CoDelExcelTXService.java
@@ -16,6 +16,14 @@ public interface CoDelExcelTXService {
 
     Map<String, List<String>> saveEcssCoDelNotifyByExcelTX(MultipartFile file, EcssCoDelNotifyHeaderData data, String deletedInvoices, HttpServletRequest request) throws Exception;
 
+    /**
+     * TX改单导入（重建通知单）：
+     * 1. 继承原通知单客户信息和BU
+     * 2. 删除原通知单及其相关装箱/报关/UPC数据
+     * 3. 按TX导入逻辑重新生成新的发货通知单
+     */
+    Map<String, List<String>> modifyNotifyDetailByExcelTX(MultipartFile file, EcssCoDelNotifyHeaderData data, HttpServletRequest request) throws Exception;
+
     void downloadDeclarationElements(HttpServletResponse response, EcssDeclarationHeaderData data);
 
     void downloadDeclaration(HttpServletResponse response, EcssDeclarationHeaderData data);
diff --git a/src/main/java/com/xujie/sys/modules/ecss/service/impl/CoDelExcelTXServiceImpl.java b/src/main/java/com/xujie/sys/modules/ecss/service/impl/CoDelExcelTXServiceImpl.java
index 4ccb69cb..ffd65444 100644
--- a/src/main/java/com/xujie/sys/modules/ecss/service/impl/CoDelExcelTXServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/ecss/service/impl/CoDelExcelTXServiceImpl.java
@@ -271,6 +271,161 @@ public class CoDelExcelTXServiceImpl implements CoDelExcelTXService {
         return result;
     }
 
+    @Override
+    public Map<String, List<String>> modifyNotifyDetailByExcelTX(MultipartFile file, EcssCoDelNotifyHeaderData data, HttpServletRequest request) throws Exception {
+        List<String> successList = new ArrayList<>();
+        List<String> failList = new ArrayList<>();
+        TransactionTemplate sheetTxTemplate = new TransactionTemplate(transactionManager);
+        sheetTxTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
+
+        try (Workbook workbook = WorkbookFactory.create(file.getInputStream())) {
+            for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
+                Sheet sheet = workbook.getSheetAt(i);
+                if (sheet.getPhysicalNumberOfRows() < 2) {
+                    continue;
+                }
+                String cmcInvoice = getInvoiceFromSheet(sheet);
+                try {
+                    sheetTxTemplate.executeWithoutResult(status -> {
+                        try {
+                            rebuildNotifyBySheet(sheet, data, request);
+                        } catch (Exception e) {
+                            status.setRollbackOnly();
+                            throw new RuntimeException(e);
+                        }
+                    });
+                    if (StringUtils.isNotBlank(cmcInvoice)) {
+                        successList.add(cmcInvoice);
+                    }
+                } catch (Exception e) {
+                    Throwable cause = e;
+                    while (cause.getCause() != null) {
+                        cause = cause.getCause();
+                    }
+                    String errMsg = cause.getMessage() != null ? cause.getMessage() : e.getMessage();
+                    failList.add("Sheet [" + sheet.getSheetName() + "] 错误：" + errMsg);
+                    log.error("TX改单导入失败并回滚: sheetName={}, cmcInvoice={}, err={}", sheet.getSheetName(), cmcInvoice, errMsg, e);
+                }
+            }
+        }
+
+        Map<String, List<String>> result = new HashMap<>();
+        result.put("success", successList);
+        result.put("fail", failList);
+        return result;
+    }
+
+    /**
+     * 单个Sheet执行“删除旧通知单关联数据 + 继承旧客户信息 + 重新建单”
+     */
+    private void rebuildNotifyBySheet(Sheet sheet, EcssCoDelNotifyHeaderData requestData, HttpServletRequest request) throws Exception {
+        String sheetInvoice = getInvoiceFromSheet(sheet);
+        if (StringUtils.isBlank(sheetInvoice)) {
+            throw new RuntimeException("发票号为空，无法执行改单导入");
+        }
+
+        EcssCoDelNotifyHeaderData sourceHeader = resolveSourceNotifyForModify(sheetInvoice, requestData);
+        EcssCoDelNotifyHeaderData importData = buildModifyImportData(sourceHeader, requestData);
+
+        clearNotifyRelatedData(sourceHeader);
+        processSheet(sheet, importData, request);
+    }
+
+    /**
+     * 获取本次改单导入的原始通知单（用于继承客户信息和BU）
+     */
+    private EcssCoDelNotifyHeaderData resolveSourceNotifyForModify(String sheetInvoice, EcssCoDelNotifyHeaderData requestData) {
+        if (requestData == null) {
+            throw new RuntimeException("请求参数为空，无法识别原发货通知单");
+        }
+
+        if (StringUtils.isNotBlank(requestData.getCmcInvoice())
+                && !StringUtils.equals(requestData.getCmcInvoice(), sheetInvoice)) {
+            throw new RuntimeException("导入发票号[" + sheetInvoice + "]与当前选中发票号[" + requestData.getCmcInvoice() + "]不一致");
+        }
+
+        EcssCoDelNotifyHeaderData sourceHeader = null;
+        if (StringUtils.isNotBlank(requestData.getSite()) && StringUtils.isNotBlank(requestData.getDelNo())) {
+            sourceHeader = coDelMapper.getEcssCoDelNotifyHeader(requestData.getSite(), requestData.getDelNo());
+            if (sourceHeader == null) {
+                throw new RuntimeException("未找到原发货通知单，site=" + requestData.getSite() + "，delNo=" + requestData.getDelNo());
+            }
+            if (StringUtils.isNotBlank(sourceHeader.getCmcInvoice())
+                    && !StringUtils.equals(sourceHeader.getCmcInvoice(), sheetInvoice)) {
+                throw new RuntimeException("导入发票号[" + sheetInvoice + "]与原发货通知单发票号[" + sourceHeader.getCmcInvoice() + "]不一致");
+            }
+            return sourceHeader;
+        }
+
+        List<EcssCoDelNotifyHeaderData> headers = coDelMapper.checkIfHasHeader(sheetInvoice);
+        if (headers == null || headers.isEmpty()) {
+            throw new RuntimeException("未找到原发货通知单，发票号：" + sheetInvoice);
+        }
+        sourceHeader = headers.getFirst();
+        if (StringUtils.isBlank(sourceHeader.getSite()) || StringUtils.isBlank(sourceHeader.getDelNo())) {
+            throw new RuntimeException("原发货通知单关键字段缺失，无法执行改单导入");
+        }
+        return sourceHeader;
+    }
+
+    /**
+     * 复制旧通知单客户内容和BU，用于新建通知单
+     */
+    private EcssCoDelNotifyHeaderData buildModifyImportData(EcssCoDelNotifyHeaderData sourceHeader, EcssCoDelNotifyHeaderData requestData) {
+        EcssCoDelNotifyHeaderData importData = new EcssCoDelNotifyHeaderData();
+        importData.setSite(sourceHeader.getSite());
+        importData.setBuNo(sourceHeader.getBuNo());
+        importData.setCustomerName(sourceHeader.getCustomerName());
+        importData.setLocalShipAddress(sourceHeader.getLocalShipAddress());
+        importData.setOverseasShipper(sourceHeader.getOverseasShipper());
+        importData.setOverseasAddress(sourceHeader.getOverseasAddress());
+        importData.setCnative(sourceHeader.getCnative());
+        importData.setSalesArea(sourceHeader.getSalesArea());
+        importData.setTemplateNo(sourceHeader.getTemplateNo());
+
+        String username = requestData == null ? null : requestData.getUsername();
+        if (StringUtils.isBlank(username)) {
+            SysUserEntity currentUser = (SysUserEntity) SecurityUtils.getSubject().getPrincipal();
+            if (currentUser != null) {
+                username = currentUser.getUsername();
+            }
+        }
+        importData.setUsername(username);
+        return importData;
+    }
+
+    /**
+     * 删除旧通知单关联数据：报关单、装箱、UPC、发货通知单头明细
+     */
+    private void clearNotifyRelatedData(EcssCoDelNotifyHeaderData sourceHeader) {
+        log.info("开始清理旧通知单关联数据: site={}, buNo={}, delNo={}, cmcInvoice={}",
+                sourceHeader.getSite(), sourceHeader.getBuNo(), sourceHeader.getDelNo(), sourceHeader.getCmcInvoice());
+
+        EcssCoDelPalletHeaderData palletData = new EcssCoDelPalletHeaderData();
+        palletData.setSite(sourceHeader.getSite());
+        palletData.setBuNo(sourceHeader.getBuNo());
+        palletData.setDelNo(sourceHeader.getDelNo());
+        coDelMapper.deleteBoxList(palletData);
+        coDelMapper.deletePalletDetail(sourceHeader.getSite(), sourceHeader.getBuNo(), sourceHeader.getDelNo(), null, null);
+        coDelMapper.deletePalletHeader(palletData);
+
+        if (StringUtils.isNotBlank(sourceHeader.getCmcInvoice())) {
+            coDelMapper.deleteUpcImportByCmcInvoice(sourceHeader.getSite(), sourceHeader.getCmcInvoice());
+        }
+
+        EcssDeclarationHeaderData declarationQuery = new EcssDeclarationHeaderData();
+        declarationQuery.setSite(sourceHeader.getSite());
+        declarationQuery.setDelNo(sourceHeader.getDelNo());
+        EcssDeclarationHeaderData declaration = coDelMapper.getDeclarationHeaderByDelNo(declarationQuery);
+        if (declaration != null && StringUtils.isNotBlank(declaration.getDeclarationNo())) {
+            coDelMapper.deleteDeclarationHeader(declaration);
+            coDelMapper.deleteDeclarationDetail(declaration);
+        }
+
+        coDelMapper.deleteAllEcssDelDetail(sourceHeader);
+        coDelMapper.deleteEcssDelHeader(sourceHeader);
+    }
+
     private String getInvoiceFromSheet(Sheet sheet) {
         Row headerRow = sheet.getRow(0);
         if (headerRow == null) return null;