diff --git a/BUILD.gn b/BUILD.gn
index f471b043f89b82d0074af068e51dc437704beda3..dd8884a1bf70897cbd195a23620f70e56eaf0625 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -54,6 +54,7 @@ ohos_copy("ets_component") {
     "api/@internal/component/ets/ellipse.d.ts",
     "api/@internal/component/ets/enums.d.ts",
     "api/@internal/component/ets/flex.d.ts",
+    "api/@internal/component/ets/flow_item.d.ts",
     "api/@internal/component/ets/for_each.d.ts",
     "api/@internal/component/ets/form_component.d.ts",
     "api/@internal/component/ets/gauge.d.ts",
@@ -116,6 +117,7 @@ ohos_copy("ets_component") {
     "api/@internal/component/ets/toggle.d.ts",
     "api/@internal/component/ets/units.d.ts",
     "api/@internal/component/ets/video.d.ts",
+    "api/@internal/component/ets/water_flow.d.ts",
     "api/@internal/component/ets/web.d.ts",
     "api/@internal/component/ets/xcomponent.d.ts",
   ]
diff --git a/api/@internal/component/ets/flow_item.d.ts b/api/@internal/component/ets/flow_item.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..de49d0f548e58b0e3f44aadd5f228af96d653c52
--- /dev/null
+++ b/api/@internal/component/ets/flow_item.d.ts
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2021-2022 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.
+ */
+
+/**
+ * 瀑布流网格容器中单项内容容器.
+ * @since 9
+ */
+interface FlowItemInterface {
+  /**
+   * 返回FlowItem.
+   * @since 9
+   */
+  (): FlowItemAttribute;
+}
+
+/**
+ * FlowItem属性
+ * @since 9
+ */
+declare class FlowItemAttribute extends CommonMethod<FlowItemAttribute> {
+  /**
+   * FlowItem占用行数.
+   * @since 9
+   */
+  rowSpan(value: number): FlowItemAttribute;
+ 
+  /**
+   * FlowItem占用列数.
+   * @since 9
+   */
+  columnSpan(value: number): FlowItemAttribute;
+}
+
+declare const FlowItem: FlowItemInterface
+declare const FlowItemInstance: FlowItemAttribute;
diff --git a/api/@internal/component/ets/index-full.d.ts b/api/@internal/component/ets/index-full.d.ts
index 49f67636a8d844da42addaa171a020969a9b1fd1..422d29078831938268723cccf797f2d6879d5d24 100644
--- a/api/@internal/component/ets/index-full.d.ts
+++ b/api/@internal/component/ets/index-full.d.ts
@@ -37,6 +37,7 @@
 /// <reference path="./ellipse.d.ts" />
 /// <reference path="./enums.d.ts" />
 /// <reference path="./flex.d.ts" />
+/// <reference path="./flow_item.d.ts" />
 /// <reference path="./for_each.d.ts" />
 /// <reference path="./form_component.d.ts" />
 /// <reference path="./gauge.d.ts" />
@@ -96,6 +97,7 @@
 /// <reference path="./toggle.d.ts" />
 /// <reference path="./units.d.ts" />
 /// <reference path="./video.d.ts" />
+/// <reference path="./water_flow.d.ts" />
 /// <reference path="./web.d.ts" />
 /// <reference path="./xcomponent.d.ts" />
 /// <reference path="./inspector.d.ts" />
diff --git a/api/@internal/component/ets/middle_class.d.ts b/api/@internal/component/ets/middle_class.d.ts
index 0b11a3d26c5444c2c66e1e329e113d7a13020bd9..b49fad281c66de22feacc2481439a3a0cefbe283 100644
--- a/api/@internal/component/ets/middle_class.d.ts
+++ b/api/@internal/component/ets/middle_class.d.ts
@@ -2373,3 +2373,55 @@ declare class TSRemoteWindowAttribute extends CommonMethod<RemoteWindowAttribute
    */
   pop(): RemoteWindowAttribute;
 }
+
+declare class TSWaterFlowAttribute extends CommonMethod<WaterFlowAttribute> {
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  create(style: GridStyle, scroller?: Scroller): WaterFlowAttribute;
+
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  pop(): WaterFlowAttribute;
+
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  debugLine(value: string): WaterFlowAttribute;
+}
+
+declare class TSFlowItemAttribute extends CommonMethod<FlowItemAttribute> {
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  create(): FlowItemAttribute;
+
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  pop(): FlowItemAttribute;
+
+  /**
+   * Used for TS compiler.
+   * @ignore
+   * @systemapi
+   * @since 9
+   */
+  debugLine(value: string): FlowItemAttribute;
+}
\ No newline at end of file
diff --git a/api/@internal/component/ets/water_flow.d.ts b/api/@internal/component/ets/water_flow.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..12bc63441fe247b51d552f1d7a7aaa57e7295f1a
--- /dev/null
+++ b/api/@internal/component/ets/water_flow.d.ts
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2021-2022 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.
+ */
+
+/**
+ * 瀑布流样式, 将网格容器划分成"行"和"列", FlowItem元素可以在网格容器内
+ * 按照主轴、辅轴方向顺序布局排列。
+ * crossSplice：辅轴方向的网格分割份数。
+ * mainLength：主轴方向的宫格高度。可选参数，不指定的时候，网格为正方形。
+ * @since 9
+ */
+declare interface GridStyle {
+  crossSplice: number;
+  mainLength?: Length;
+}
+
+/**
+ * 瀑布流容器, 二维容器, 支持GridStyle样式。
+ * @since 9
+ */
+interface WaterFlowInterface {
+  /**
+   * 返回WaterFlow.
+   * @since 9
+   */
+  (style: GridStyle, scroller?: Scroller): WaterFlowAttribute;
+}
+
+/**
+ * WaterFlow组件属性
+ * @since 9
+ */
+declare class WaterFlowAttribute extends CommonMethod<WaterFlowAttribute> {
+  /**
+   * 用于设置列与列的间距
+   * @since 9
+   */
+  columnsGap(value: Length): WaterFlowAttribute;
+
+  /**
+   * 用于设置行与行的间距
+   * @since 9
+   */
+  rowsGap(value: Length): WaterFlowAttribute;
+
+  /**
+   * 控制WaterFlow的布局方向
+   * @since 9
+   */
+  layoutDirection(value: LayoutDirection): WaterFlowAttribute;
+}
+
+declare const WaterFlow: WaterFlowInterface;
+declare const WaterFlowInstance: WaterFlowAttribute;