diff --git a/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java b/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
index 7e86363..c997492 100644
--- a/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
+++ b/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
@@ -141,10 +141,13 @@ public class ImageServiceImpl extends ServiceImpl<ImageMapper, ImageEntity> impl
         if (StrUtil.isEmpty(imageSource) || Objects.isNull(ImageSourceEnum.getByCode(imageSource))) {
             throw new ServiceException(Message.IMAGE_SOURCE_IS_NOT_EXIST);
         }
-        PartResp partResp = partService.detail(partId);
         if(null == files || files.length == 0){
             throw new ServiceException(Message.IMAGE_IS_EMPTY);
         }
+        PartResp partResp = partService.detail(partId);
+        if (Objects.isNull(partResp)) {
+            throw new ServiceException(Message.PART_ID_IS_NOT_EXIST);
+        }
         List<ImageReq> list = new ArrayList<>(files.length);
         File temCategory = new File(FilePathEnum.IMAGE_TEMP.getFileAbsolutePathPrefix());
         if (!temCategory.exists()) {