diff --git a/src/main/java/com/ai/da/controller/LibraryController.java b/src/main/java/com/ai/da/controller/LibraryController.java
index 24519fce..2c38937d 100644
--- a/src/main/java/com/ai/da/controller/LibraryController.java
+++ b/src/main/java/com/ai/da/controller/LibraryController.java
@@ -72,7 +72,8 @@ public class LibraryController {
                                             @ApiParam("本地时区,比如 'Asia/Tokyo' 东京时间 , 'Asia/Shanghai' 北京时间 由js本地获取")
                                                 @RequestParam(value = "timeZone") String timeZone,
                                             @RequestParam(value = "modelType") String modelType,
-                                            @RequestParam(value = "sex") String sex) {
+                                            @RequestParam(value = "sex") String sex,
+                                            @RequestParam(value = "checkMd5") Integer checkMd5) {
         Assert.isTrue(!StringUtils.isEmpty(file.getOriginalFilename()),"Please select a file!");
          Integer high =null;
          Integer width =null;
@@ -87,8 +88,12 @@ public class LibraryController {
             high = fileVO.getHigh();
             width = fileVO.getWidth();
         }
+        String md5 = MD5Utils.encryptFile(file);
+        if (checkMd5 == null || checkMd5 == 1) {
+            libraryService.checkMd5(level1Type, level2Type, sex, md5);
+        }
         return Response.success(libraryService.upload(new LibraryUploadDTO(file, level1Type,level2Type,
-                timeZone, MD5Utils.encryptFile(file),high,width,modelType,sex)));
+                timeZone, md5,high,width,modelType,sex)));
     }
     @ApiOperation(value = "保存或者编辑template打点")
     @PostMapping("/saveOrEditTemplatePoint")
diff --git a/src/main/java/com/ai/da/service/LibraryService.java b/src/main/java/com/ai/da/service/LibraryService.java
index 4a68ef72..be8182a7 100644
--- a/src/main/java/com/ai/da/service/LibraryService.java
+++ b/src/main/java/com/ai/da/service/LibraryService.java
@@ -71,4 +71,6 @@ public interface LibraryService extends IService<Library> {
     Boolean updateLibraryLevel2Type(LibraryLevel2TypeUpdateDTO libraryLevel2TypeUpdateDTO);
 
     String processMannequins(String uploadPath);
+
+    void checkMd5(String level1Type, String level2Type, String sex, String md5);
 }
diff --git a/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java b/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
index 2f4994d4..dc2f9234 100644
--- a/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/LibraryServiceImpl.java
@@ -1,6 +1,7 @@
 package com.ai.da.service.impl;
 
 import cn.hutool.core.exceptions.ExceptionUtil;
+import cn.hutool.system.UserInfo;
 import com.ai.da.common.config.FileProperties;
 import com.ai.da.common.config.exception.BusinessException;
 import com.ai.da.common.context.UserContext;
@@ -256,6 +257,27 @@ public class LibraryServiceImpl extends ServiceImpl<LibraryMapper, Library> impl
         throw new BusinessException("generate design exception!");
     }
 
+    @Override
+    public void checkMd5(String level1Type, String level2Type, String sex, String md5) {
+        AuthPrincipalVo userInfo = UserContext.getUserHolder();
+        QueryWrapper<Library> qw = new QueryWrapper<>();
+        qw.lambda().eq(Library::getAccountId, userInfo.getId());
+        qw.lambda().eq(Library::getLevel1Type, level1Type);
+        if (!StringUtils.isEmpty(sex)) {
+            if (level1Type.equals(LibraryLevel1TypeEnum.SKETCH_BOARD)) {
+                qw.lambda().eq(Library::getLevel2Type, level2Type);
+                qw.lambda().eq(Library::getLevel3Type, sex);
+            }else {
+                qw.lambda().eq(Library::getLevel2Type, sex);
+            }
+        }
+        qw.lambda().eq(Library::getMd5, md5);
+        List<Library> libraryList = libraryMapper.selectList(qw);
+        if (!CollectionUtils.isEmpty(libraryList)) {
+            throw new BusinessException("Your library already contains the images you uploaded, Are you sure to upload them");
+        }
+    }
+
     private Library resolveData(LibraryUploadDTO uploadDTO, AuthPrincipalVo userInfo, String filePath) {
         if (StringUtils.isEmpty(uploadDTO.getModelType()) || uploadDTO.getModelType().equals(ModelType.LIBRARY.getValue())) {
             Library library = CopyUtil.copyObject(uploadDTO, Library.class);
@@ -293,7 +315,7 @@ public class LibraryServiceImpl extends ServiceImpl<LibraryMapper, Library> impl
         if (StringUtils.isEmpty(modelSex)) {
             return StringUtils.isEmpty(level2Type) ? userId + "/" + level1TypeEnum.getRealName().toLowerCase() : userId + "/" + level1TypeEnum.getRealName().toLowerCase() + "/" + level2Type;
         }else {
-            return StringUtils.isEmpty(level2Type) ? userId + "/" + level1TypeEnum.getRealName().toLowerCase() + "/" + modelSex : userId + "/" + level1TypeEnum.getRealName().toLowerCase() + "/" + modelSex + "/" + level2Type;
+            return StringUtils.isEmpty(level2Type) ? userId + "/" + level1TypeEnum.getRealName().toLowerCase() + "/" + modelSex.toLowerCase() : userId + "/" + level1TypeEnum.getRealName().toLowerCase() + "/" + modelSex.toLowerCase() + "/" + level2Type;
         }
     }