diff --git a/packages/database/src/__tests__/index.ts b/packages/database/src/__tests__/index.ts
index 4c8753191..f1843a43f 100644
--- a/packages/database/src/__tests__/index.ts
+++ b/packages/database/src/__tests__/index.ts
@@ -4,7 +4,9 @@ import { Dialect } from 'sequelize';
 function getTestKey() {
   const { id } = require.main;
   const key = id
-    .replace(process.env.PWD, '')
+    // .replace(process.env.PWD, '')
+    .replace(`${process.env.PWD}/packages`, '')
+    .replace(/src\/__tests__/g, '')
     .replace('.test.ts', '')
     .replace(/[^\w]/g, '_');
   return key
@@ -32,6 +34,9 @@ export function getDatabase() {
     ...config,
     sync: {
       force: true,
+      alter: {
+        drop: true,
+      }
     },
     hooks: {
       beforeDefine(columns, model) {
diff --git a/packages/database/src/__tests__/model/updateAssociations.test.ts b/packages/database/src/__tests__/model/updateAssociations.test.ts
new file mode 100644
index 000000000..21a1e6690
--- /dev/null
+++ b/packages/database/src/__tests__/model/updateAssociations.test.ts
@@ -0,0 +1,107 @@
+import { getDatabase } from '..';
+import Database from '../..';
+
+let db: Database;
+
+beforeEach(async () => {
+  db = getDatabase();
+  db.table({
+    name: 'users',
+    fields: [
+      {
+        type: 'hasMany',
+        name: 'posts',
+      },
+      {
+        type: 'hasOne',
+        name: 'profile',
+      }
+    ],
+  });
+  db.table({
+    name: 'profiles',
+  });
+  db.table({
+    name: 'posts',
+    fields: [
+      {
+        type: 'hasMany',
+        name: 'comments',
+      },
+      {
+        type: 'belongsTo',
+        name: 'user',
+      },
+      {
+        type: 'belongsToMany',
+        name: 'tags',
+      }
+    ],
+  });
+  db.table({
+    name: 'tags',
+    fields: [
+      {
+        type: 'belongsToMany',
+        name: 'posts',
+      }
+    ]
+  });
+  db.table({
+    name: 'comments',
+    fields: [
+      {
+        type: 'belongsTo',
+        name: 'post',
+      },
+    ]
+  });
+  await db.sync();
+});
+
+afterEach(async () => {
+  await db.close();
+});
+
+describe('updateAssociations', () => {
+  describe('set null', () => {
+    it('belongsTo', async () => {
+      const [User, Post] = db.getModels(['users', 'posts']);
+      const user = await User.create();
+      const post = await Post.create();
+      await post.updateAssociations({
+        user,
+      });
+      await post.updateAssociations({});
+      const postUser = await post.getUser();
+      expect(postUser.id).toBe(user.id);
+      await post.updateAssociations({
+        user: null,
+      });
+      expect(await post.getUser()).toBeNull();
+    });
+
+    it('hasMany', async () => {
+      const [User, Post] = db.getModels(['users', 'posts']);
+      const user = await User.create();
+      const post = await Post.create();
+      await user.updateAssociations({
+        posts: [post],
+      });
+      expect(await user.countPosts()).toBe(1);
+      await user.updateAssociations({
+        posts: [], // 空数组
+      });
+      expect(await user.countPosts()).toBe(0);
+      await user.updateAssociations({
+        posts: [post],
+      });
+      expect(await user.countPosts()).toBe(1);
+      await user.updateAssociations({
+        posts: null,
+      });
+      expect(await user.countPosts()).toBe(0);
+    });
+  });
+});
+
diff --git a/packages/database/src/model.ts b/packages/database/src/model.ts
index afdbda12c..d8de02fe4 100644
--- a/packages/database/src/model.ts
+++ b/packages/database/src/model.ts
@@ -137,6 +137,10 @@ export const DEFAULT_OFFSET = 0;
 export const DEFAULT_LIMIT = 100;
 export const MAX_LIMIT = 500;
 
+export interface UpdateAssociationOptions extends SaveOptions {
+  context?: any;
+}
+
 /**
  * Model 相关
  * 
@@ -281,7 +285,7 @@ export abstract class Model extends SequelizeModel {
     return where;
   }
 
-  async updateSingleAssociation(key: string, data: any, options: SaveOptions<any> & { context?: any; } = {}) {
+  async updateSingleAssociation(key: string, data: any, options: UpdateAssociationOptions = {}) {
     const {
       fields,
       transaction = await this.sequelize.transaction(),
@@ -293,6 +297,11 @@ export abstract class Model extends SequelizeModel {
     const association = table.getAssociations().get(key);
     const accessors = association.getAccessors();
 
+    if (data == null) {
+      await this[accessors.set](null, opts);
+      return;
+    }
+
     if (typeof data === 'number' || typeof data === 'string' || data instanceof SequelizeModel) {
       await this[accessors.set](data, opts);
     } else if (typeof data === 'object') {
@@ -323,11 +332,8 @@ export abstract class Model extends SequelizeModel {
     }
   }
 
-  async updateMultipleAssociation(associationName: string, data: any, options: SaveOptions<any> & { context?: any; } = {}) {
-    const items = Array.isArray(data) ? data : [data];
-    if (!items.length) {
-      return;
-    }
+  async updateMultipleAssociation(associationName: string, data: any, options: UpdateAssociationOptions = {}) {
+    const items = Array.isArray(data) ? data : data == null ? [] : [data];
 
     const {
       fields,
@@ -339,6 +345,12 @@ export abstract class Model extends SequelizeModel {
     const table = this.database.getTable(this.constructor.name);
     const association = table.getAssociations().get(associationName);
     const accessors = association.getAccessors();
+
+    if (!items.length) {
+      await this[accessors.set](null, opts);
+      return;
+    }
+
     const Target = association.getTargetModel();
     // 当前表关联 target 表的外键（大部分情况与 target 表主键相同，但可以设置为不同的，要考虑）
     const { targetKey = Target.primaryKeyAttribute } = association.options;
@@ -481,7 +493,7 @@ export abstract class Model extends SequelizeModel {
     }
   }
 
-  async updateAssociation(key: string, data: any, options: SaveOptions<any> & { context?: any; }) {
+  async updateAssociation(key: string, data: any, options: UpdateAssociationOptions = {}) {
     const table = this.database.getTable(this.constructor.name);
     const association = table.getAssociations().get(key);
     switch (true) {
@@ -497,15 +509,14 @@ export abstract class Model extends SequelizeModel {
   /**
    * 关联数据的更新
    * 
-   * TODO: 暂不支持除主键以外关联字段的更新
-   * 
    * @param data
    */
-  async updateAssociations(data: any, options: SaveOptions & { context?: any } = {}) {
+  async updateAssociations(data: any, options: UpdateAssociationOptions = {}) {
     const { transaction = await this.sequelize.transaction() } = options;
     const table = this.database.getTable(this.constructor.name);
     for (const key of table.getAssociations().keys()) {
-      if (!data[key]) {
+      // 如果 key 不存在才跳过
+      if (!Object.keys(data).includes(key)) {
         continue;
       }
       await this.updateAssociation(key, data[key], {