diff --git a/src/component/toolbox/featureManager.ts b/src/component/toolbox/featureManager.ts
index 65b0917bc9..f7d1aa9a3f 100644
--- a/src/component/toolbox/featureManager.ts
+++ b/src/component/toolbox/featureManager.ts
@@ -102,7 +102,7 @@ export interface UserDefinedToolboxFeature {
     onclick(): void
 }
 
-type ToolboxFeatureCtor = {
+export type ToolboxFeatureCtor = {
     new(): ToolboxFeature
     /**
      * Static defaultOption property
diff --git a/src/export/core.ts b/src/export/core.ts
index 7d42fe1abf..455b021536 100644
--- a/src/export/core.ts
+++ b/src/export/core.ts
@@ -23,6 +23,18 @@ export * from '../core/echarts';
 export * from './api';
 import { use } from '../extension';
 
+export type {
+    EChartsExtension,
+    EChartsExtensionInstaller,
+    EChartsExtensionInstallRegisters
+} from '../extension';
+export {
+    ToolboxFeature,
+    ToolboxFeatureOption,
+    ToolboxFeatureModel,
+    ToolboxFeatureCtor
+} from '../component/toolbox/featureManager';
+
 // Import label layout by default.
 // TODO will be treeshaked.
 import { installLabelLayout } from '../label/installLabelLayout';
diff --git a/src/extension.ts b/src/extension.ts
index d9794d2c2a..3027ef7e5b 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -43,6 +43,7 @@ import { registerImpl } from './core/impl';
 import { registerPainter } from 'zrender/src/zrender';
 import { CustomSeriesRenderItem } from './chart/custom/CustomSeries';
 import { registerCustomSeries } from './chart/custom/customSeriesRegister';
+import { registerFeature as registerToolboxFeature } from './component/toolbox/featureManager';
 
 const extensions: (EChartsExtensionInstaller | EChartsExtension)[] = [];
 
@@ -60,6 +61,7 @@ const extensionRegisters = {
     registerLoading,
     registerMap,
     registerImpl,
+    registerToolboxFeature,
 
     PRIORITY,
 
diff --git a/test/types/esm/importPartial.ts b/test/types/esm/importPartial.ts
index 57e42f286b..b56c1a4357 100644
--- a/test/types/esm/importPartial.ts
+++ b/test/types/esm/importPartial.ts
@@ -17,7 +17,14 @@
 * under the License.
 */
 
-import {init, use, ComposeOption} from 'echarts/core';
+import {
+    init,
+    use,
+    ComposeOption,
+    EChartsExtensionInstaller,
+    ToolboxFeature,
+    ToolboxFeatureOption
+} from 'echarts/core';
 import {
     BarChart,
     BarSeriesOption,
@@ -36,6 +43,23 @@ import {
 
 use([BarChart, LineChart, GridComponent, DataZoomComponent, CanvasRenderer]);
 
+interface ExportDataFeatureOption extends ToolboxFeatureOption {
+    filename?: string
+}
+
+class ExportDataFeature extends ToolboxFeature<ExportDataFeatureOption> {
+    onclick(): void {
+        this.api.getOption();
+        this.model.get('filename');
+    }
+}
+
+const installExportData: EChartsExtensionInstaller = function (registers) {
+    registers.registerToolboxFeature('exportData', ExportDataFeature);
+};
+
+use(installExportData);
+
 type Option = ComposeOption<
     GridComponentOption
     | DataZoomComponentOption
@@ -61,4 +85,4 @@ const dom = document.createElement('div');
 dom.className = 'chart';
 
 const chart = init(dom);
-chart.setOption(option);
\ No newline at end of file
+chart.setOption(option);
diff --git a/test/ut/spec/component/toolbox/featureExtension.test.ts b/test/ut/spec/component/toolbox/featureExtension.test.ts
new file mode 100644
index 0000000000..e71b573486
--- /dev/null
+++ b/test/ut/spec/component/toolbox/featureExtension.test.ts
@@ -0,0 +1,46 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+import {
+    EChartsExtensionInstaller,
+    ToolboxFeature,
+    ToolboxFeatureOption,
+    use
+} from '@/src/export/core';
+import { getFeature } from '@/src/component/toolbox/featureManager';
+
+interface ExportDataFeatureOption extends ToolboxFeatureOption {
+    filename?: string
+}
+
+class ExportDataFeature extends ToolboxFeature<ExportDataFeatureOption> {
+    onclick(): void {}
+}
+
+describe('toolbox feature extension', function () {
+    it('registers a toolbox feature through the extension API', function () {
+        const install: EChartsExtensionInstaller = function (registers) {
+            registers.registerToolboxFeature('exportData', ExportDataFeature);
+        };
+
+        use(install);
+
+        expect(getFeature('exportData')).toBe(ExportDataFeature);
+    });
+});