diff --git a/src/main/java/com/ai/da/controller/ClassificationController.java b/src/main/java/com/ai/da/controller/ClassificationController.java
index 9e94b4b5..5cfb2678 100644
--- a/src/main/java/com/ai/da/controller/ClassificationController.java
+++ b/src/main/java/com/ai/da/controller/ClassificationController.java
@@ -67,4 +67,11 @@ public class ClassificationController {
         return Response.success(classificationService.queryClassification(classificationDTO));
     }
 
+    @PostMapping("/relationLibrary")
+    @ApiOperationSupport(order = 4)
+    @ApiModelProperty(value = "关联", notes = "传入ClassificationDTO")
+    public Response<Boolean> relationLibrary(@Valid @RequestBody ClassificationDTO classificationDTO) {
+        return Response.success(classificationService.relationLibrary(classificationDTO));
+    }
+
 }
diff --git a/src/main/java/com/ai/da/mapper/entity/Classification.java b/src/main/java/com/ai/da/mapper/entity/Classification.java
index 753c16f7..65a8c238 100644
--- a/src/main/java/com/ai/da/mapper/entity/Classification.java
+++ b/src/main/java/com/ai/da/mapper/entity/Classification.java
@@ -35,6 +35,6 @@ public class Classification implements Serializable {
     @ApiModelProperty(value = "更新时间")
     private LocalDateTime updateTime;
     @ApiModelProperty(value = "是否删除1:是0:否")
-    private Integer isDeleted;
+    private Integer isDeleted = 0;
 
 }
diff --git a/src/main/java/com/ai/da/service/ClassificationService.java b/src/main/java/com/ai/da/service/ClassificationService.java
index 5eab2895..f25f10ef 100644
--- a/src/main/java/com/ai/da/service/ClassificationService.java
+++ b/src/main/java/com/ai/da/service/ClassificationService.java
@@ -27,4 +27,6 @@ public interface ClassificationService {
     List<ClassificationVO> queryClassification(ClassificationDTO classificationDTO);
 
     List<ClassificationVO> getClassificationVOList(List<Classification> classificationList);
+
+    Boolean relationLibrary(ClassificationDTO classificationDTO);
 }
diff --git a/src/main/java/com/ai/da/service/impl/ClassificationServiceImpl.java b/src/main/java/com/ai/da/service/impl/ClassificationServiceImpl.java
index ecf37cd2..f2cb2f83 100644
--- a/src/main/java/com/ai/da/service/impl/ClassificationServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/ClassificationServiceImpl.java
@@ -24,6 +24,7 @@ import javax.annotation.Resource;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * @author SHAHAIBO
@@ -121,6 +122,41 @@ public class ClassificationServiceImpl implements ClassificationService {
         return classificationVOS;
     }
 
+    @Override
+    public Boolean relationLibrary(ClassificationDTO classificationDTO) {
+        QueryWrapper<ClassificationRelLibrary> qw = new QueryWrapper<>();
+        qw.lambda().eq(ClassificationRelLibrary::getLibraryId, classificationDTO.getLibraryId());
+        List<ClassificationRelLibrary> classificationRelLibraryList = classificationRelLibraryMapper.selectList(qw);
+        List<Long> unchangedIds = classificationRelLibraryList.stream()
+                .map(ClassificationRelLibrary::getClassificationId)
+                .filter(classificationId -> classificationDTO.getClassificationIdList().contains(classificationId))
+                .collect(Collectors.toList());
+        List<Long> deleteIds = classificationRelLibraryList.stream()
+                .map(ClassificationRelLibrary::getClassificationId)
+                .filter(classificationId -> !unchangedIds.contains(classificationId))
+                .collect(Collectors.toList());
+        List<Long> addIds = classificationDTO.getClassificationIdList().stream()
+                .filter(classificationId -> !unchangedIds.contains(classificationId))
+                .collect(Collectors.toList());
+        if (CollectionUtil.isNotEmpty(deleteIds)) {
+            QueryWrapper<ClassificationRelLibrary> deleteQw = new QueryWrapper<>();
+            deleteQw.lambda().eq(ClassificationRelLibrary::getLibraryId, classificationDTO.getLibraryId());
+            deleteQw.lambda().in(ClassificationRelLibrary::getClassificationId, deleteIds);
+            classificationRelLibraryMapper.delete(deleteQw);
+        }
+        if (CollectionUtil.isNotEmpty(addIds)) {
+            for (Long addId : addIds) {
+                ClassificationRelLibrary classificationRelLibrary = new ClassificationRelLibrary();
+                classificationRelLibrary.setClassificationId(addId);
+                classificationRelLibrary.setLibraryId(classificationDTO.getLibraryId());
+                classificationRelLibrary.setCreateTime(LocalDateTime.now());
+//                classificationRelLibrary.setUserId();
+                classificationRelLibraryMapper.insert(classificationRelLibrary);
+            }
+        }
+        return Boolean.TRUE;
+    }
+
     private List<ClassificationVO> recursionClassificationVO(ClassificationVO classificationVO) {
         QueryWrapper<Classification> qw = new QueryWrapper<>();
         qw.lambda().eq(Classification::getParentId, classificationVO.getId());
diff --git a/src/main/resources/application-test.properties b/src/main/resources/application-test.properties
index 5d019e7b..49f7346c 100644
--- a/src/main/resources/application-test.properties
+++ b/src/main/resources/application-test.properties
@@ -19,7 +19,7 @@ spring.security.jwtTokenPrefix=Bearer-
 spring.security.jwtExpiration=8640000000
 #spring security权限设置 认证了token还要认证权限 不然报错Full authentication is required to access this resource
 spring.security.ignorePaths=/,/favicon.ico,/doc.html,/webjars/**,/swagger-resources,/v2/api-docs,\
-  /api/account/**,/api/element/**,/api/python/**,/api/design/**,/api/history/**,/api/library/**,/api/third/party/**,/api/generate/**,/api/workspace/**
+  /api/account/**,/api/element/**,/api/python/**,/api/design/**,/api/history/**,/api/library/**,/api/third/party/**,/api/generate/**,/api/workspace/**,/api/classification/**
 spring.security.authApi=/auth/login