diff --git a/mall-ebtp-cloud-attachment-sdk/src/main/java/com/chinaunicom/ebtp/mall/cloud/attachment/sdk/api/DefaultAttachmentClient.java b/mall-ebtp-cloud-attachment-sdk/src/main/java/com/chinaunicom/ebtp/mall/cloud/attachment/sdk/api/DefaultAttachmentClient.java
index 2728137..df966f4 100644
--- a/mall-ebtp-cloud-attachment-sdk/src/main/java/com/chinaunicom/ebtp/mall/cloud/attachment/sdk/api/DefaultAttachmentClient.java
+++ b/mall-ebtp-cloud-attachment-sdk/src/main/java/com/chinaunicom/ebtp/mall/cloud/attachment/sdk/api/DefaultAttachmentClient.java
@@ -187,6 +187,8 @@ public class DefaultAttachmentClient implements AttachmentClient {
 	 */
 	@Override
 	public Optional<UploadObject> upload(String businessId, File file) {
+		removeDuplicateObject(businessId, file.getName());
+
 		String res = documentCenterService.upload("ebtp-mall-cloud", businessId, fileConvertor.toMultipartFile(file));
 
 		log.debug(res);
@@ -196,6 +198,8 @@ public class DefaultAttachmentClient implements AttachmentClient {
 
 	@Override
 	public Optional<UploadObject> upload(String businessId, String filename, byte[] array) {
+		removeDuplicateObject(businessId, filename);
+
 		String res = documentCenterService.upload("ebtp-mall-cloud", businessId,
 				fileConvertor.toMultipartFile(filename, array));
 
@@ -228,4 +232,21 @@ public class DefaultAttachmentClient implements AttachmentClient {
 		return documentCenterService.deleteByOid(objectId);
 	}
 
+	/////////////////////////////////////// Private Method
+	/**
+	 * 根据业务要求， bid下不能挂在同名文件，需要去重
+	 * 
+	 * @param businessId
+	 * @param filename
+	 */
+	private void removeDuplicateObject(String businessId, String filename) {
+		Optional<AttachmentDetail> op = findByBusinessId(Arrays.asList(businessId));
+
+		op.ifPresent(detail -> {
+			detail.get(businessId).stream().filter(obj -> obj.getFilename().equals(filename)).forEach(obj -> {
+				deleteByOid(obj.getId());
+			});
+		});
+	}
+
 }