diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsSyncConstant.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsSyncConstant.java
index 5585ea46..26c54bb0 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsSyncConstant.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsSyncConstant.java
@@ -195,6 +195,11 @@ public final class HcsSyncConstant {
 	 */
 	public static final String PAYMENT_ATTACH_TYPE_SPEC_RESULT = "spec_result";
 
+	/**
+	 * 合规特批结果附件统一业务名（金蝶上送与前端展示用，上传时按 C103-5 响应头补扩展名）
+	 */
+	public static final String PAYMENT_SPEC_ATTACH_NAME = "付款特批流程附件";
+
 	/**
 	 * 附件类型：用印附件（双章归档文件，取值沿用 ContractManageServiceImpl#FILE_TYPE_SEAL_ARCHIVE）
 	 */
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/PaymentApplicationServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/PaymentApplicationServiceImpl.java
index e91c6ba1..63da966d 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/PaymentApplicationServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/PaymentApplicationServiceImpl.java
@@ -606,11 +606,11 @@ public class PaymentApplicationServiceImpl extends BaseServiceImpl<PaymentApplic
 			rows.removeIf(row -> row instanceof Map<?, ?> map
 				&& HcsSyncConstant.PAYMENT_ATTACH_TYPE_SPEC_RESULT.equals(map.get("attachmentType")));
 			Map<String, Object> specRow = new LinkedHashMap<>();
-			specRow.put("name", "付款特批附件.pdf");
+			specRow.put("name", HcsSyncConstant.PAYMENT_SPEC_ATTACH_NAME + ".pdf");
 			specRow.put("attachmentType", HcsSyncConstant.PAYMENT_ATTACH_TYPE_SPEC_RESULT);
 			// 网关按服务名前缀路由（口径同 nacos skip-url）；inline 内嵌预览 pdf，浏览器可直接查看/另存
 			specRow.put("url", "/blade-transport/hcs/attachment/download?fdId=" + vo.getHcsSpecAttachFdId()
-				+ "&inline=true&name=" + URLEncoder.encode("付款特批附件.pdf", StandardCharsets.UTF_8));
+				+ "&inline=true&name=" + URLEncoder.encode(HcsSyncConstant.PAYMENT_SPEC_ATTACH_NAME + ".pdf", StandardCharsets.UTF_8));
 			rows.add(specRow);
 			vo.setAttachmentsJson(JsonUtil.toJson(rows));
 		} catch (Exception exception) {
@@ -636,7 +636,8 @@ public class PaymentApplicationServiceImpl extends BaseServiceImpl<PaymentApplic
 				kingdeeAttachmentSyncSupport.parseUserAttachments(entity.getAttachmentsJson()));
 			// 合规付款特批结果附件（paymentLegal/result 回传）：C103-5 按合规附件ID 下载后联带上传金蝶
 			if (Func.isNotBlank(entity.getHcsSpecAttachFdId())) {
-				items.add(KingdeeAttachmentSyncSupport.KingdeeAttachmentItem.hcsAttachment("付款特批附件", entity.getHcsSpecAttachFdId()));
+				items.add(KingdeeAttachmentSyncSupport.KingdeeAttachmentItem.hcsAttachment(
+					HcsSyncConstant.PAYMENT_SPEC_ATTACH_NAME, entity.getHcsSpecAttachFdId()));
 			}
 			kingdeeAttachmentSyncSupport.syncAttachments(KingdeeAttachmentConstant.BIZ_PAY_APPLICATION,
 				id, entity.getKingdeeBillId(), items);
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/support/KingdeeAttachmentSyncSupport.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/support/KingdeeAttachmentSyncSupport.java
index 4b5b609d..bda86c68 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/support/KingdeeAttachmentSyncSupport.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/support/KingdeeAttachmentSyncSupport.java
@@ -35,6 +35,7 @@ import org.springblade.core.tool.utils.Func;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiAttachmentUploadVO;
 import org.springblade.thirdparty.bfi.service.IBfiService;
 import org.springblade.transport.constant.KingdeeAttachmentConstant;
+import org.springblade.transport.constant.HcsSyncConstant;
 import org.springblade.transport.mapper.KingdeeAttachmentSyncMapper;
 import org.springblade.transport.pojo.entity.KingdeeAttachmentSync;
 import org.springblade.transport.support.hcs.HcsAttachmentSupport;
@@ -432,23 +433,31 @@ public class KingdeeAttachmentSyncSupport {
 	}
 
 	/**
-	 * 解析合规附件文件名（BFI 附件上传要求带后缀名）：名称已带后缀原样返回；
-	 * 否则优先取 C103-5 响应头 Content-Disposition 文件名，其次按 Content-Type 映射扩展名追加，兜底 .pdf
+	 * 解析合规附件文件名：统一业务名（HcsSyncConstant.PAYMENT_SPEC_ATTACH_NAME）+ 扩展名，
+	 * 扩展名优先取 C103-5 响应头 Content-Disposition 文件名后缀，其次按 Content-Type 映射，兜底 .pdf；
+	 * 不上送合规侧原始名（如"文档内容.pdf"），避免金蝶侧附件不可辨识
 	 *
 	 * @param response     C103-5 文件流响应
-	 * @param fallbackName 兜底名称（无扩展名）
-	 * @return 带后缀名的文件名
+	 * @param fallbackName 统一业务名
+	 * @return 业务名 + 后缀名
 	 */
 	private String resolveHcsFileName(Response response, String fallbackName) {
-		String name = Func.isBlank(fallbackName) ? "付款特批附件" : fallbackName.trim();
+		String name = Func.isBlank(fallbackName) ? HcsSyncConstant.PAYMENT_SPEC_ATTACH_NAME : fallbackName.trim();
 		if (name.lastIndexOf('.') > 0) {
 			return name;
 		}
-		String fromDisposition = fileNameFromDisposition(firstHeader(response, "Content-Disposition"));
-		if (Func.isNotBlank(fromDisposition) && fromDisposition.lastIndexOf('.') > 0) {
-			return fromDisposition;
+		String extension = extensionOf(fileNameFromDisposition(firstHeader(response, "Content-Disposition")));
+		if (Func.isBlank(extension)) {
+			extension = extensionOfContentType(firstHeader(response, "Content-Type"));
 		}
-		return name + extensionOfContentType(firstHeader(response, "Content-Type"));
+		return name + extension;
+	}
+
+	/** 取文件名扩展名（含点，无扩展名返回空串） */
+	private String extensionOf(String fileName) {
+		String name = Func.isBlank(fileName) ? "" : fileName.trim();
+		int index = name.lastIndexOf('.');
+		return index > 0 && index < name.length() - 1 ? name.substring(index) : "";
 	}
 
 	/**