diff --git a/libs/horizon/src/dom/DOMExternal.ts b/libs/horizon/src/dom/DOMExternal.ts
index f3054261..0baa43c2 100644
--- a/libs/horizon/src/dom/DOMExternal.ts
+++ b/libs/horizon/src/dom/DOMExternal.ts
@@ -86,7 +86,7 @@ function removeRootEventLister(container: Container) {
 
 // 卸载入口
 function destroy(container: Container): boolean {
-  if (container._treeRoot) {
+  if (container && container._treeRoot) {
     syncUpdates(() => {
       executeRender(null, container, () => {
         removeRootEventLister(container);
diff --git a/libs/horizon/src/renderer/ContextSaver.ts b/libs/horizon/src/renderer/ContextSaver.ts
index 2e72ce3c..e0ea8432 100644
--- a/libs/horizon/src/renderer/ContextSaver.ts
+++ b/libs/horizon/src/renderer/ContextSaver.ts
@@ -7,7 +7,6 @@ import type { VNode, ContextType } from './Types';
 import type { Container } from '../dom/DOMOperator';
 
 import { getNSCtx } from '../dom/DOMOperator';
-import { ContextProvider } from './vnode/VNodeTags';
 
 // 保存的是“http://www.w3.org/1999/xhtml”或“http://www.w3.org/2000/svg”，
 // 用于识别是使用document.createElement()还是使用document.createElementNS()创建DOM
@@ -44,32 +43,3 @@ export function resetContext(providerVNode: VNode) {
 
   context.value = providerVNode.context;
 }
-
-// 在局部更新时，从上到下恢复父节点的context
-export function recoverParentContext(vNode: VNode) {
-  const contextProviders: VNode[] = [];
-  let parent = vNode.parent;
-  while (parent !== null) {
-    if (parent.tag === ContextProvider) {
-      contextProviders.unshift(parent);
-    }
-    parent = parent.parent;
-  }
-  contextProviders.forEach(node => {
-    setContext(node, node.props.value);
-  });
-}
-
-// 在局部更新时，从下到上重置父节点的context
-export function resetParentContext(vNode: VNode) {
-  let parent = vNode.parent;
-
-  while (parent !== null) {
-    if (parent.tag === ContextProvider) {
-      resetContext(parent);
-    }
-    parent = parent.parent;
-  }
-}
-
-
diff --git a/libs/horizon/src/renderer/TreeBuilder.ts b/libs/horizon/src/renderer/TreeBuilder.ts
index 2622bc4a..d9a10bd7 100644
--- a/libs/horizon/src/renderer/TreeBuilder.ts
+++ b/libs/horizon/src/renderer/TreeBuilder.ts
@@ -2,7 +2,7 @@ import type { VNode } from './Types';
 
 import { callRenderQueueImmediate, pushRenderCallback } from './taskExecutor/RenderQueue';
 import { updateVNode } from './vnode/VNodeCreator';
-import { DomComponent, DomPortal, TreeRoot } from './vnode/VNodeTags';
+import { ContextProvider, DomComponent, DomPortal, TreeRoot } from './vnode/VNodeTags';
 import { FlagUtils, InitFlag, Interrupted } from './vnode/VNodeFlags';
 import { captureVNode } from './render/BaseComponent';
 import { checkLoopingUpdateLimit, submitToRender } from './submit/Submit';
@@ -30,7 +30,12 @@ import {
   isExecuting,
   setExecuteMode,
 } from './ExecuteMode';
-import { recoverParentContext, resetNamespaceCtx, resetParentContext, setNamespaceCtx } from './ContextSaver';
+import {
+  resetContext,
+  resetNamespaceCtx,
+  setContext,
+  setNamespaceCtx,
+} from './ContextSaver';
 import {
   updateChildShouldUpdate,
   updateParentsChildShouldUpdate,
@@ -244,7 +249,7 @@ function buildVNodeTree(treeRoot: VNode) {
     }
 
     // 恢复父节点的context
-    recoverParentContext(startVNode);
+    recoverTreeContext(startVNode);
   }
 
   // 重置环境变量，为重新进行深度遍历做准备
@@ -272,7 +277,7 @@ function buildVNodeTree(treeRoot: VNode) {
   }
   if (startVNode.tag !== TreeRoot) { // 不是根节点
     // 恢复父节点的context
-    resetParentContext(startVNode);
+    resetTreeContext(startVNode);
   }
 
   setProcessingClassVNode(null);
@@ -280,6 +285,39 @@ function buildVNodeTree(treeRoot: VNode) {
   setExecuteMode(preMode);
 }
 
+// 在局部更新时，从上到下恢复父节点的context和PortalStack
+function recoverTreeContext(vNode: VNode) {
+  const contextProviders: VNode[] = [];
+  let parent = vNode.parent;
+  while (parent !== null) {
+    if (parent.tag === ContextProvider) {
+      contextProviders.unshift(parent);
+    }
+    if(parent.tag === DomPortal){
+      pushCurrentRoot(parent);
+    }
+    parent = parent.parent;
+  }
+  contextProviders.forEach(node => {
+    setContext(node, node.props.value);
+  });
+}
+
+// 在局部更新时，从下到上重置父节点的context
+function resetTreeContext(vNode: VNode) {
+  let parent = vNode.parent;
+
+  while (parent !== null) {
+    if (parent.tag === ContextProvider) {
+      resetContext(parent);
+    }
+    if(parent.tag === DomPortal){
+      popCurrentRoot();
+    }
+    parent = parent.parent;
+  }
+}
+
 // 总体任务入口
 function renderFromRoot(treeRoot) {
   runAsyncEffects();
diff --git a/libs/horizon/src/renderer/render/BaseComponent.ts b/libs/horizon/src/renderer/render/BaseComponent.ts
index e027696c..34ba6b6c 100644
--- a/libs/horizon/src/renderer/render/BaseComponent.ts
+++ b/libs/horizon/src/renderer/render/BaseComponent.ts
@@ -7,9 +7,10 @@ import { onlyUpdateChildVNodes } from '../vnode/VNodeCreator';
 import componentRenders from './index';
 import { setProcessingVNode } from '../GlobalVar';
 import { clearVNodeObservers } from '../../horizonx/store/StoreHandler';
+import { pushCurrentRoot } from '../RootStack';
 
-// 复用vNode时，也需对stack进行处理
-function handlerContext(processing: VNode) {
+// 复用vNode时，也需对树的上下文值处理，如context，portal, namespaceContext
+function setTreeContextValue(processing: VNode) {
   switch (processing.tag) {
     case TreeRoot:
       setNamespaceCtx(processing, processing.realNode);
@@ -19,6 +20,7 @@ function handlerContext(processing: VNode) {
       break;
     case DomPortal:
       setNamespaceCtx(processing, processing.realNode);
+      pushCurrentRoot(processing);
       break;
     case ContextProvider: {
       const newValue = processing.props.value;
@@ -36,7 +38,7 @@ export function captureVNode(processing: VNode): VNode | null {
     // 该vNode没有变化，不用进入capture，直接复用。
     if (!processing.isCreated && processing.oldProps === processing.props && !processing.shouldUpdate) {
       // 复用还需对stack进行处理
-      handlerContext(processing);
+      setTreeContextValue(processing);
 
       return onlyUpdateChildVNodes(processing);
     }
diff --git a/scripts/__tests__/ComponentTest/PortalComponent.test.js b/scripts/__tests__/ComponentTest/PortalComponent.test.js
index 05908f18..2dcadc38 100755
--- a/scripts/__tests__/ComponentTest/PortalComponent.test.js
+++ b/scripts/__tests__/ComponentTest/PortalComponent.test.js
@@ -1,5 +1,6 @@
 import * as Horizon from '@cloudsop/horizon/index.ts';
 import { getLogUtils } from '../jest/testUtils';
+import dispatchChangeEvent from '../utils/dispatchChangeEvent';
 
 describe('PortalComponent Test', () => {
   const LogUtils = getLogUtils();
@@ -14,12 +15,10 @@ describe('PortalComponent Test', () => {
       }
 
       render() {
-        return Horizon.createPortal(
-          this.props.child,
-          this.element,
-        );
+        return Horizon.createPortal(this.props.child, this.element);
       }
     }
+
     Horizon.render(<PortalApp child={<div>PortalApp</div>} />, container);
     expect(container.textContent).toBe('');
     // <div>PortalApp</div>被渲染到了portalRoot而非container
@@ -43,17 +42,12 @@ describe('PortalComponent Test', () => {
 
       render() {
         return [
-          Horizon.createPortal(
-            this.props.child,
-            this.element,
-          ),
-          Horizon.createPortal(
-            this.props.child,
-            this.newElement,
-          )
+          Horizon.createPortal(this.props.child, this.element),
+          Horizon.createPortal(this.props.child, this.newElement),
         ];
       }
     }
+
     Horizon.render(<PortalApp child={<div>PortalApp</div>} />, container);
     expect(container.textContent).toBe('');
     // <div>PortalApp</div>被渲染到了portalRoot而非container
@@ -82,21 +76,16 @@ describe('PortalComponent Test', () => {
       render() {
         return [
           <div>PortalApp1st</div>,
-          Horizon.createPortal([
-            <div>PortalApp4</div>,
-            Horizon.createPortal(
-              this.props.child,
-              this.element3rd,
-            ),
-          ], this.element),
-          <div>PortalApp2nd</div>,
           Horizon.createPortal(
-            this.props.child,
-            this.newElement,
-          )
+            [<div>PortalApp4</div>, Horizon.createPortal(this.props.child, this.element3rd)],
+            this.element
+          ),
+          <div>PortalApp2nd</div>,
+          Horizon.createPortal(this.props.child, this.newElement),
         ];
       }
     }
+
     Horizon.render(<PortalApp child={<div>PortalApp</div>} />, container);
     expect(container.textContent).toBe('PortalApp1stPortalApp2nd');
     // <div>PortalApp4</div>会挂载在this.element上
@@ -120,25 +109,23 @@ describe('PortalComponent Test', () => {
       }
 
       render() {
-        return Horizon.createPortal(
-          this.props.child,
-          this.element,
-        );
+        return Horizon.createPortal(this.props.child, this.element);
       }
     }
-    Horizon.render(<PortalApp key='portal' child={<div>PortalApp</div>} />, container);
+
+    Horizon.render(<PortalApp key="portal" child={<div>PortalApp</div>} />, container);
     expect(container.textContent).toBe('');
     expect(portalRoot.textContent).toBe('PortalApp');
 
-    Horizon.render(<PortalApp key='portal' child={<div>AppPortal</div>} />, container);
+    Horizon.render(<PortalApp key="portal" child={<div>AppPortal</div>} />, container);
     expect(container.textContent).toBe('');
     expect(portalRoot.textContent).toBe('AppPortal');
 
-    Horizon.render(<PortalApp key='portal' child={['por', 'tal']} />, container);
+    Horizon.render(<PortalApp key="portal" child={['por', 'tal']} />, container);
     expect(container.textContent).toBe('');
     expect(portalRoot.textContent).toBe('portal');
 
-    Horizon.render(<PortalApp key='portal' child={null} />, container);
+    Horizon.render(<PortalApp key="portal" child={null} />, container);
     expect(container.textContent).toBe('');
     expect(portalRoot.textContent).toBe('');
 
@@ -158,10 +145,7 @@ describe('PortalComponent Test', () => {
       }
 
       render() {
-        return Horizon.createPortal(
-          this.props.child,
-          this.element,
-        );
+        return Horizon.createPortal(this.props.child, this.element);
       }
     }
 
@@ -173,7 +157,6 @@ describe('PortalComponent Test', () => {
       );
     };
 
-
     const App = () => {
       const handleClick = () => {
         LogUtils.log('bubble click event');
@@ -185,9 +168,7 @@ describe('PortalComponent Test', () => {
 
       return (
         <div onClickCapture={handleCaptureClick()} onClick={handleClick()}>
-          <PortalApp child={<Child />}>
-
-          </PortalApp>
+          <PortalApp child={<Child />}></PortalApp>
         </div>
       );
     };
@@ -199,24 +180,23 @@ describe('PortalComponent Test', () => {
     expect(LogUtils.getAndClear()).toEqual([
       // 从外到内先捕获再冒泡
       'capture click event',
-      'bubble click event'
+      'bubble click event',
     ]);
   });
 
   it('Create portal at app root should not add event listener multiple times', () => {
-  const btnRef = Horizon.createRef();
+    const btnRef = Horizon.createRef();
+
     class PortalApp extends Horizon.Component {
       constructor(props) {
         super(props);
       }
 
       render() {
-        return Horizon.createPortal(
-          this.props.child,
-          container,
-        );
+        return Horizon.createPortal(this.props.child, container);
       }
     }
+
     const onClick = jest.fn();
 
     class App extends Horizon.Component {
@@ -225,14 +205,70 @@ describe('PortalComponent Test', () => {
       }
 
       render() {
-        return <div>
-          <button onClick={onClick} ref={btnRef}></button>
-          <PortalApp />
-        </div>;
+        return (
+          <div>
+            <button onClick={onClick} ref={btnRef}></button>
+            <PortalApp />
+          </div>
+        );
       }
     }
+
     Horizon.render(<App />, container);
     btnRef.current.click();
     expect(onClick).toHaveBeenCalledTimes(1);
   });
+
+  it('#76 Portal onChange should activate', () => {
+    class Dialog extends Horizon.Component {
+      node;
+
+      constructor(props) {
+        super(props);
+        this.node = window.document.createElement('div');
+        window.document.body.appendChild(this.node);
+      }
+
+      render() {
+        return Horizon.createPortal(this.props.children, this.node);
+      }
+    }
+
+    let showPortalInput;
+    const fn = jest.fn();
+    const inputRef = Horizon.createRef();
+
+    function App() {
+      const Input = () => {
+        const [show, setShow] = Horizon.useState(false);
+        showPortalInput = setShow;
+
+        Horizon.useEffect(() => {
+          setTimeout(() => {
+            setShow(true);
+          }, 0);
+        }, []);
+
+        if (!show) {
+          return null;
+        }
+
+        return <input onChange={fn} ref={inputRef} />;
+      };
+
+      return (
+        <div>
+          <Dialog>
+            <Input />
+          </Dialog>
+        </div>
+      );
+    }
+
+    Horizon.render(<App />, container);
+    showPortalInput(true);
+    jest.advanceTimersToNextTimer();
+    dispatchChangeEvent(inputRef.current, 'test');
+    expect(fn).toHaveBeenCalledTimes(1);
+  });
 });
diff --git a/scripts/__tests__/utils/dispatchChangeEvent.js b/scripts/__tests__/utils/dispatchChangeEvent.js
new file mode 100644
index 00000000..1b8bbd04
--- /dev/null
+++ b/scripts/__tests__/utils/dispatchChangeEvent.js
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) Huawei Technologies Co., Ltd. 2022-2022. All rights reserved.
+ */
+export default function dispatchChangeEvent(inputEle, value) {
+  const nativeInputSetter = Object.getOwnPropertyDescriptor(window.HTMLInputElement.prototype, 'value').set;
+  nativeInputSetter.call(inputEle, value);
+
+  inputEle.dispatchEvent(new Event('input', { bubbles: true}));
+}