diff --git a/packages/database/src/table.ts b/packages/database/src/table.ts
index 52e24b4b8..c2d3e007d 100644
--- a/packages/database/src/table.ts
+++ b/packages/database/src/table.ts
@@ -180,7 +180,8 @@ export class Table {
 
   public modelInit(reinitialize: Reinitialize = false) {
     if (reinitialize || !this.Model) {
-      this.Model = this.defaultModel || class extends Model { };
+      let DefaultModel = this.defaultModel;
+      this.Model = DefaultModel ? (class extends DefaultModel {}) : (class extends Model { });
       this.Model.database = this.database;
       // 关系的建立是在 model.init 之后，在配置中表字段（Column）和关系（Relation）都在 fields，
       // 所以需要单独提炼出 associations 字段，并在 Model.init 之后执行 Model.associate
diff --git a/packages/plugin-saas/package.json b/packages/plugin-saas/package.json
index f2966ad4e..ac9f3792d 100644
--- a/packages/plugin-saas/package.json
+++ b/packages/plugin-saas/package.json
@@ -10,8 +10,5 @@
     "deepmerge": "^4.2.2",
     "flat-to-nested": "^1.1.1"
   },
-  "devDependencies": {
-    "@nocobase/actions": "^0.4.0-alpha.7"
-  },
   "gitHead": "f0b335ac30f29f25c95d7d137655fa64d8d67f1e"
 }
diff --git a/packages/plugin-saas/src/server.ts b/packages/plugin-saas/src/server.ts
new file mode 100644
index 000000000..7ca973381
--- /dev/null
+++ b/packages/plugin-saas/src/server.ts
@@ -0,0 +1,146 @@
+import compose from 'koa-compose';
+import { Application, PluginOptions } from '@nocobase/server';
+import Koa from 'koa';
+
+function createApp(opts) {
+  const { name } = opts;
+  const options = {
+    database: {
+      username: process.env.DB_USER,
+      password: process.env.DB_PASSWORD,
+      database: process.env.DB_DATABASE,
+      host: process.env.DB_HOST,
+      port: process.env.DB_PORT as any,
+      dialect: process.env.DB_DIALECT as any,
+      dialectOptions: {
+        charset: 'utf8mb4',
+        collate: 'utf8mb4_unicode_ci',
+      },
+      pool: {
+        max: 5,
+        min: 0,
+        acquire: 60000,
+        idle: 10000,
+      },
+      logging: process.env.DB_LOG_SQL === 'on' ? console.log : false,
+      define: {},
+      sync: {
+        force: false,
+        alter: {
+          drop: false,
+        },
+      },
+    },
+    // dataWrapping: false,
+    resourcer: {
+      prefix: `/api/saas/${name}`,
+    },
+  };
+  const app = new Application(options);
+
+  app.db.sequelize.beforeDefine((model, options) => {
+    options.tableName = `saas_${name}_${
+      options.tableName || options.name.plural
+    }`;
+  });
+
+  app.resource({
+    name: 'saas',
+    actions: {
+      async getInfo(ctx, next) {
+        ctx.body = {
+          m: Object.values(ctx.db.sequelize.models).map((m: any) => m.tableName),
+        };
+        await next();
+      },
+    },
+  });
+
+  const plugins = [
+    '@nocobase/plugin-collections',
+    '@nocobase/plugin-ui-router',
+    '@nocobase/plugin-ui-schema',
+    '@nocobase/plugin-users',
+    '@nocobase/plugin-action-logs',
+    '@nocobase/plugin-file-manager',
+    '@nocobase/plugin-permissions',
+    '@nocobase/plugin-export',
+    '@nocobase/plugin-system-settings',
+    '@nocobase/plugin-china-region',
+  ];
+
+  for (const plugin of plugins) {
+    app.plugin(
+      require(`${plugin}/${__filename.endsWith('.ts') ? 'src' : 'lib'}/server`)
+        .default,
+    );
+  }
+
+  return app;
+}
+
+function multiApps({ getAppName }) {
+  return async function (ctx: Koa.Context, next) {
+    const appName = getAppName(ctx);
+    if (!appName) {
+      return next();
+    }
+    const App = ctx.db.getModel('applications');
+    const model = await App.findOne({
+      where: { name: appName },
+    });
+    if (!model) {
+      return next();
+    }
+    const apps = ctx.app['apps'];
+    if (!apps.has(appName)) {
+      const app = createApp({
+        name: appName,
+      });
+      await app.load();
+      apps.set(appName, app);
+    }
+    const app = apps.get(appName);
+    // 完全隔离的做法
+    const handleRequest = app.callback();
+    await handleRequest(ctx.req, ctx.res);
+  };
+}
+
+export default {
+  name: 'saas',
+  async load() {
+    this.app['apps'] = new Map<string, Application>();
+    this.app.collection({
+      name: 'applications',
+      fields: [
+        { type: 'string', name: 'name', unique: true },
+        { type: 'belongsTo', name: 'user' },
+      ],
+    });
+    this.app.use(
+      multiApps({
+        getAppName(ctx) {
+          return ctx.path.split('/')[3];
+        },
+      }),
+    );
+    this.app
+      .command('app:create')
+      .argument('<appName>')
+      .action(async (appName) => {
+        const App = this.app.db.getModel('applications');
+        const model = await App.findOne({
+          where: {
+            name: appName,
+          },
+        });
+        if (!model) {
+          await App.create({
+            name: appName,
+          });
+        }
+        await this.app.destroy();
+      });
+  },
+} as PluginOptions;
diff --git a/packages/server/src/application.ts b/packages/server/src/application.ts
index d253e1b37..a431a82c5 100644
--- a/packages/server/src/application.ts
+++ b/packages/server/src/application.ts
@@ -104,7 +104,6 @@ export class Application<
         console.log('db sync...');
         const cli = args.pop();
         const force = cli.opts()?.force;
-        await this.load();
         await this.db.sync(
           force
             ? {
@@ -123,7 +122,6 @@ export class Application<
       // .option('-f, --force')
       .action(async (...args) => {
         const cli = args.pop();
-        await this.load();
         await this.db.sync({
           force: true,
           alter: {
@@ -141,7 +139,6 @@ export class Application<
         const cli = args.pop();
         console.log(args);
         const opts = cli.opts();
-        await this.load();
         await this.emitAsync('beforeStart');
         this.listen(opts.port || 3000);
         console.log(`http://localhost:${opts.port || 3000}/`);
@@ -274,6 +271,7 @@ export class Application<
   }
 
   async parse(argv = process.argv) {
+    await this.load();
     return this.cli.parseAsync(argv);
   }