diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
index 40c18b2d..e27d0c3c 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
@@ -509,25 +509,31 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 					+ "]财务应收单未在金蝶生成，请先在正式付款单页面同步金蝶");
 			}
 		}
-		// A303-4 幂等预检：按申请单号（billno 候选键）查询金蝶是否已生成开票申请单（防上次推送成功但本地回滚的断链重推）
+		// 加载发票张次与商品行：每张发票张次对应一张金蝶开票申请单（按张次拆分开票）
+		List<InvoiceApplicationSheet> sheets = sheetMapper.selectList(Wrappers.<InvoiceApplicationSheet>lambdaQuery()
+			.eq(InvoiceApplicationSheet::getInvoiceApplicationId, id).orderByAsc(InvoiceApplicationSheet::getSheetNo));
+		if (Func.isEmpty(sheets)) {
+			throw new ServiceException("推送金蝶开票申请失败：开票申请无发票张次");
+		}
+		Map<Long, List<InvoiceApplicationLine>> linesBySheetId = lineMapper.selectList(Wrappers.<InvoiceApplicationLine>lambdaQuery()
+				.eq(InvoiceApplicationLine::getInvoiceApplicationId, id)).stream()
+			.collect(Collectors.groupingBy(InvoiceApplicationLine::getInvoiceSheetId));
+		// 每张发票的金蝶业务单据编号（A303-1 billno 候选键，须唯一）：单张=开票申请单号（兼容存量），多张=开票申请单号-张次序号
+		List<String> sheetBillNos = sheets.stream().map(sheet -> this.sheetBillNo(entity, sheet, sheets.size())).toList();
+		// A303-4 幂等预检：按全部候选 billno 查询金蝶是否已生成开票申请单（防上次推送成功但本地回滚的断链重推），
+		// 已生成的张次幂等跳过，未生成的张次重新推送
 		BfiInvoiceApplyQueryDTO idempotentQuery = new BfiInvoiceApplyQueryDTO();
 		idempotentQuery.setPageNo(1);
-		idempotentQuery.setPageSize(10);
-		idempotentQuery.setBillno(List.of(entity.getApplicationNo()));
-		List<BfiInvoiceApplyVO> existApplies = List.of();
+		idempotentQuery.setPageSize(Math.max(sheets.size(), 10));
+		idempotentQuery.setBillno(sheetBillNos);
+		Set<String> existSheetBillNos = new LinkedHashSet<>();
 		BfiPageVO<BfiInvoiceApplyVO> existPage = bfiService.queryInvoiceApply(idempotentQuery);
 		if (existPage != null && Func.isNotEmpty(existPage.getRows())) {
-			existApplies = existPage.getRows();
-		}
-		for (BfiInvoiceApplyVO existApply : existApplies) {
-			if (existApply != null && entity.getApplicationNo().equals(existApply.getBillno())) {
-				// 金蝶已生成：直接回填视为同步成功（勾稽纠偏）
-				entity.setKingdeeBillNo(existApply.getBillno());
-				entity.setKingdeeStatus(KingdeeBfiConstant.KINGDEE_STATUS_SYNCED);
-				entity.setSyncedTime(LocalDateTime.now());
-				updateById(entity);
-				record(entity.getId(), "sync", "同步金蝶（勾稽回填）", TransportBusiConstant.APPROVED, TransportBusiConstant.APPROVED, null, existApply.getBillno());
-				return existApply.getBillno();
+			for (BfiInvoiceApplyVO existApply : existPage.getRows()) {
+				if (existApply != null && Func.isNotBlank(existApply.getBillno())
+					&& sheetBillNos.contains(existApply.getBillno())) {
+					existSheetBillNos.add(existApply.getBillno());
+				}
 			}
 		}
 		// 组装 A303-1 开票申请单（字段映射见设计文档 6.3/6.4）
@@ -564,16 +570,92 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 		if (customer == null || Func.isBlank(customer.getCustomerCode())) {
 			throw new ServiceException("推送金蝶开票申请失败：受票方客户未在客商档案中维护客商编码，请补充后重试");
 		}
-		// 单据体分录：逐「开票内容」商品行一条，取数口径即页面开票内容行（金额/税率透传行值）
-		List<BfiInvoiceApplySaveEntryDTO> items = this.resolveInvoiceApplyEntries(entity);
+		// 逐张发票推送金蝶开票申请单：每张发票张次一张（价税合计=本张金额，分录=本张商品行），已存在的张次幂等跳过
+		List<String> savedBillNos = new ArrayList<>();
+		List<InvoiceApplicationSheet> sheetsToUpdate = new ArrayList<>();
+		boolean pushedNew = false;
+		for (InvoiceApplicationSheet sheet : sheets) {
+			String sheetBillNo = this.sheetBillNo(entity, sheet, sheets.size());
+			if (existSheetBillNos.contains(sheetBillNo)) {
+				// 金蝶已生成：本张幂等回填（勾稽纠偏），不重复推送
+				sheet.setKingdeeBillNo(sheetBillNo);
+				savedBillNos.add(sheetBillNo);
+				log.info("金蝶开票申请已生成：开票申请[{}]发票张[{}]，billno=[{}]，幂等跳过推送",
+					entity.getApplicationNo(), sheet.getSheetNo(), sheetBillNo);
+				sheetsToUpdate.add(sheet);
+				continue;
+			}
+			// 本张商品行分录：逐「开票内容」商品行一条（金额/税率透传行值，张内行号升序）
+			List<BfiInvoiceApplySaveEntryDTO> items = linesBySheetId.getOrDefault(sheet.getId(), List.of()).stream()
+				.sorted(Comparator.comparing(InvoiceApplicationLine::getLineNo,
+					Comparator.nullsLast(Comparator.naturalOrder())))
+				.map(this::buildInvoiceApplyEntry)
+				.toList();
+			if (Func.isEmpty(items)) {
+				throw new ServiceException("推送金蝶开票申请失败：发票张[" + Func.toStr(sheet.getSheetNo())
+					+ "]无商品行，无法组装分录");
+			}
+			BfiInvoiceApplySaveDTO param = this.buildInvoiceApplyParam(entity, sheetBillNo, seller, salerAddr, salerBank,
+				dept, customer, money(sheet.getInvoiceAmount()), items);
+			log.info("金蝶开票申请推送：开票申请[{}]发票张[{}]，billno=[{}]，价税合计=[{}]，分录{}条",
+				entity.getApplicationNo(), sheet.getSheetNo(), sheetBillNo, sheet.getInvoiceAmount(), items.size());
+			BfiBillSaveResultVO saveResult = bfiService.saveInvoiceApply(param);
+			kingdeeApBillSyncSupport.requireBfiSaveSuccess(saveResult,
+				"推送金蝶开票申请发票张[" + Func.toStr(sheet.getSheetNo()) + "]");
+			String kingdeeNo = saveResult.getResult().get(0).getNumber();
+			sheet.setKingdeeBillNo(kingdeeNo);
+			savedBillNos.add(kingdeeNo);
+			pushedNew = true;
+			sheetsToUpdate.add(sheet);
+		}
+		if (Func.isEmpty(savedBillNos)) {
+			throw new ServiceException("推送金蝶开票申请失败：无发票张次可推送");
+		}
+		// 批量回写每张发票张次的金蝶单号，避免逐张单次更新（N+1）
+		if (!sheetsToUpdate.isEmpty()) {
+			Db.updateBatchById(sheetsToUpdate);
+		}
+		String joinedBillNos = String.join(",", savedBillNos);
+		entity.setKingdeeBillNo(joinedBillNos);
+		entity.setKingdeeStatus(KingdeeBfiConstant.KINGDEE_STATUS_SYNCED);
+		entity.setSyncedTime(LocalDateTime.now());
+		updateById(entity);
+		record(entity.getId(), "sync", pushedNew ? "同步金蝶" : "同步金蝶（勾稽回填）",
+			TransportBusiConstant.APPROVED, TransportBusiConstant.APPROVED, null, joinedBillNos);
+		return joinedBillNos;
+	}
+
+	/**
+	 * 单张发票的金蝶业务单据编号（A303-1 billno 候选键，须唯一）：
+	 * 单张发票=开票申请单号（兼容存量推送口径），多张发票=开票申请单号-张次序号
+	 *
+	 * @param entity     开票申请
+	 * @param sheet      发票张次
+	 * @param sheetCount 发票张次数
+	 * @return 金蝶业务单据编号
+	 */
+	private String sheetBillNo(InvoiceApplication entity, InvoiceApplicationSheet sheet, int sheetCount) {
+		if (sheetCount <= 1) {
+			return entity.getApplicationNo();
+		}
+		return entity.getApplicationNo() + "-" + sheet.getSheetNo();
+	}
+
+	/**
+	 * 组装 A303-1 单张开票申请单入参（字段映射见设计文档 6.3/6.4），
+	 * 购销方等主表公共字段随开票申请取数，价税合计与单据体分录取本张发票
+	 */
+	private BfiInvoiceApplySaveDTO buildInvoiceApplyParam(InvoiceApplication entity, String billNo,
+		CustomerArchive seller, String salerAddr, String salerBank, Dept dept, CustomerArchive customer,
+		BigDecimal sheetAmount, List<BfiInvoiceApplySaveEntryDTO> items) {
 		BfiInvoiceApplySaveDTO param = new BfiInvoiceApplySaveDTO();
 		// ==================== 以下为【必填】字段（BfiInvoiceApplySaveDTO 标注），非必填字段先注释保留 ====================
 		// 【必填】组织.编码：申请部门 deptId → 部门编码
 		param.setOrgidNumber(dept.getDeptCode());
 		// 【必填】申请部门.编码：同上
 		param.setAwrpOrgfieldNumber(dept.getDeptCode());
-		// 【必填】业务单据编号（候选键）：开票申请单号
-		param.setBillno(entity.getApplicationNo());
+		// 【必填】业务单据编号（候选键）：单张发票候选 billno（多张发票时开票申请单号-张次序号）
+		param.setBillno(billNo);
 		// 【必填】单据日期：申请日期 yyyy-MM-dd HH:mm:ss
 		LocalDate billDate = entity.getApplicationDate() == null ? LocalDate.now() : entity.getApplicationDate();
 		param.setBilldate(billDate.atStartOfDay().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
@@ -608,8 +690,8 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 		// 销方开户行及账号：数电专票强制校验（联调确认），客商开票信息开户行+银行账号；同步打开票面展示开关
 		param.setSalerbank(salerBank);
 		param.setShowsalerbank(true);
-		// 【必填】申请价税合计：开票金额
-		param.setTotalamount(money(entity.getInvoiceAmount()));
+		// 【必填】申请价税合计：本张发票开票金额
+		param.setTotalamount(sheetAmount);
 		// 是否含税：数电普票传1（含税），其他传0（不含税）
 		param.setHsbz("electronic_general".equals(entity.getInvoiceType()) ? "1" : "0");
 		// 【必填】客户.编码：受票方客商档案客商编码
@@ -630,42 +712,9 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 		// 数据来源系统
 		param.setSystemsource(bfiProperties.getSrcSys());
 
-		// 单据体分录：逐「开票内容」商品行一条（联调确认金蝶强校验「单据体分录不能为空」，实际必传）
+		// 单据体分录：本张发票「开票内容」商品行（联调确认金蝶强校验「单据体分录不能为空」，实际必传）
 		param.setSimOriginalBillItem(items);
-
-		BfiBillSaveResultVO saveResult = bfiService.saveInvoiceApply(param);
-		kingdeeApBillSyncSupport.requireBfiSaveSuccess(saveResult, "推送金蝶开票申请");
-		String kingdeeNo = saveResult.getResult().get(0).getNumber();
-		entity.setKingdeeBillNo(kingdeeNo);
-		entity.setKingdeeStatus(KingdeeBfiConstant.KINGDEE_STATUS_SYNCED);
-		entity.setSyncedTime(LocalDateTime.now());
-		updateById(entity);
-		record(entity.getId(), "sync", "同步金蝶", TransportBusiConstant.APPROVED, TransportBusiConstant.APPROVED, null, kingdeeNo);
-		return kingdeeNo;
-	}
-
-	/**
-	 * A303-1 单据体分录组装：逐「开票内容」商品行一条（按发票张次、张内行号平铺），
-	 * 商品和服务分类、货物或服务简称、税收分类编码、数量、单位、税率、金额、税额、备注全部取商品行落库值，
-	 * 不再回查开票项目主数据与合同计费规则
-	 */
-	private List<BfiInvoiceApplySaveEntryDTO> resolveInvoiceApplyEntries(InvoiceApplication entity) {
-		List<InvoiceApplicationSheet> sheets = sheetMapper.selectList(Wrappers.<InvoiceApplicationSheet>lambdaQuery()
-			.eq(InvoiceApplicationSheet::getInvoiceApplicationId, entity.getId()).orderByAsc(InvoiceApplicationSheet::getSheetNo));
-		Map<Long, List<InvoiceApplicationLine>> linesBySheetId = lineMapper.selectList(Wrappers.<InvoiceApplicationLine>lambdaQuery()
-				.eq(InvoiceApplicationLine::getInvoiceApplicationId, entity.getId())).stream()
-			.collect(Collectors.groupingBy(InvoiceApplicationLine::getInvoiceSheetId));
-		List<BfiInvoiceApplySaveEntryDTO> items = new ArrayList<>();
-		for (InvoiceApplicationSheet sheet : sheets) {
-			linesBySheetId.getOrDefault(sheet.getId(), List.of()).stream()
-				.sorted(Comparator.comparing(InvoiceApplicationLine::getLineNo,
-					Comparator.nullsLast(Comparator.naturalOrder())))
-				.forEach(line -> items.add(buildInvoiceApplyEntry(line)));
-		}
-		if (Func.isEmpty(items)) {
-			throw new ServiceException("推送金蝶开票申请失败：开票申请无商品行，无法组装分录");
-		}
-		return items;
+		return param;
 	}
 
 	/** 单条商品行生成一条开票分录：品目三要素、税率、金额、税额全部透传页面「开票内容」行值 */
@@ -746,7 +795,12 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 		Map<String, InvoiceApplication> applicationBySerialNo = new LinkedHashMap<>();
 		applications.forEach(application -> {
 			if (Func.isNotBlank(application.getKingdeeBillNo())) {
-				applicationBySerialNo.putIfAbsent(application.getKingdeeBillNo(), application);
+				// 多张发票时申请单金蝶单号逗号拼接存储，拆分为逐张单号分别归集回写
+				for (String serialNo : application.getKingdeeBillNo().split(",")) {
+					if (Func.isNotBlank(serialNo)) {
+						applicationBySerialNo.putIfAbsent(serialNo.trim(), application);
+					}
+				}
 			}
 		});
 		Map<String, CustomerArchive> sellerCache = new LinkedHashMap<>();