diff --git a/src/modules/content/repositories/category.repository.ts b/src/modules/content/repositories/category.repository.ts
index c5807fe..41649fc 100644
--- a/src/modules/content/repositories/category.repository.ts
+++ b/src/modules/content/repositories/category.repository.ts
@@ -13,6 +13,16 @@ export class CategoryRepository extends TreeRepository<CategoryEntity> {
         return this.createQueryBuilder('category').leftJoinAndSelect('category.parent', 'parent');
     }
 
+    /**
+     * 树形结构查询
+     * @param options
+     */
+    async findTrees(options?: FindTreeOptions) {
+        const roots = await this.findRoots(options);
+        await Promise.all(roots.map((root) => this.findDescendantsTree(root, options)));
+        return roots;
+    }
+
     /**
      * 查询顶级分类
      * @param options
diff --git a/src/modules/content/services/category.service.ts b/src/modules/content/services/category.service.ts
index 4ac6fb5..9e32fd0 100644
--- a/src/modules/content/services/category.service.ts
+++ b/src/modules/content/services/category.service.ts
@@ -105,25 +105,20 @@ export class CategoryService {
     /**
      * 获取请求传入的父分类
      * @param current 当前分类的ID
-     * @param parentId
+     * @param id
      */
     protected async getParent(current?: string, parentId?: string) {
         if (current === parentId) return undefined;
-
         let parent: CategoryEntity | undefined;
-
         if (parentId !== undefined) {
-            if (parentId !== null) return null;
-
+            if (parentId === null) return null;
             parent = await this.repository.findOne({ where: { id: parentId } });
-
             if (!parent)
                 throw new EntityNotFoundError(
                     CategoryEntity,
-                    `Parent category ${parentId} not exists !`,
+                    `Parent category ${parentId} not exists!`,
                 );
         }
-
         return parent;
     }
 }