diff --git a/api/phone/@internal/document.d.ts b/api/phone/@internal/document.d.ts
new file mode 100755
index 0000000000000000000000000000000000000000..b3766e0e1adbc251cbe911830923f86e12d8ff9d
--- /dev/null
+++ b/api/phone/@internal/document.d.ts
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020 Huawei Device Co., Ltd.
+ * Licensed 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.
+ */
+
+export declare class document {
+  /**
+   * create Element.
+   * @param tagName is tagName.
+   */
+  static createElement(tagName: string): DynamicElement;
+
+}
+
+export interface DynamicElement {
+
+  /**
+   * setAttr to Element.
+   * @param eg{"src":"common/images/bg-tv.jpg"}.
+   */
+   setAttr(attrParmas: object): void;
+
+  /**
+   * setStyle to Element.
+   * @param eg{"width":"300px","height":"300px"}
+   */
+   setStyle(styleParmas: object): void;
+
+  /**
+   * append child to element(div)
+   * @param child element
+   */
+   appendChildren(child: DynamicElement): void;
+
+}
+
diff --git a/api/phone/@internal/index.d.ts b/api/phone/@internal/index.d.ts
index 8712a2be0c6d8bd7db0dfa187cd0f1cfc2af817c..2752a2a8c3e92a3bf4ae7086670213a171b94147 100644
--- a/api/phone/@internal/index.d.ts
+++ b/api/phone/@internal/index.d.ts
@@ -16,4 +16,5 @@
 export * from './viewmodel';
 export * from './featureability';
 export * from './console';
-export * from './global';
\ No newline at end of file
+export * from './global';
+export * from './document';
\ No newline at end of file
diff --git a/api/phone/@internal/viewmodel.d.ts b/api/phone/@internal/viewmodel.d.ts
index cf357da91800da27d3e2315698d94920ba95773b..9a875a1cbe2414bd76e4f69f76a761c765c84b17 100644
--- a/api/phone/@internal/viewmodel.d.ts
+++ b/api/phone/@internal/viewmodel.d.ts
@@ -2026,6 +2026,11 @@ export interface DivElement extends Element {
    * Returns the offset of the current scrolling. The return value type is Object.
    */
   getScrollOffset(): ScrollOffset;
+
+  /**
+   * append a child, support dynamic add element.
+   */
+  appendChildren(param: { child: object }): void;
 }
 
 export interface Application {