diff --git a/libs/horizon/src/renderer/TreeBuilder.ts b/libs/horizon/src/renderer/TreeBuilder.ts
index a84b5c3d..7d6201a2 100644
--- a/libs/horizon/src/renderer/TreeBuilder.ts
+++ b/libs/horizon/src/renderer/TreeBuilder.ts
@@ -227,6 +227,8 @@ function buildVNodeTree(treeRoot: VNode) {
     }
   } while (true);
 
+  processing = null;
+
   setExecuteMode(preMode);
 }
 
@@ -272,7 +274,7 @@ export function launchUpdateFromVNode(vNode: VNode) {
   }
 
   // 保存待刷新的节点
-  treeRoot.toUpdateNodes.add(vNode);
+  treeRoot.toUpdateNodes?.add(vNode);
 
   if (checkMode(BySync) && // 非批量
     !checkMode(InRender)) { // 不是渲染阶段触发
diff --git a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
index 46260ac0..5e2fd84b 100644
--- a/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
+++ b/libs/horizon/src/renderer/submit/LifeCycleHandler.ts
@@ -71,7 +71,7 @@ function callBeforeSubmitLifeCycles(
       const root = vNode.realNode;
       clearContainer(root.outerDom);
     }
-    
+
     // No Default
   }
 }
@@ -160,39 +160,26 @@ function hideOrUnhideAllChildren(vNode, isHidden) {
 function attachRef(vNode: VNode) {
   const ref = vNode.ref;
 
-  if (ref !== null) {
-    const instance = vNode.realNode;
-
-    let refType = typeof ref;
-    if (refType === 'function') {
-      ref(instance);
-    } else if (refType === 'object') {
-      (<RefType>ref).current = instance;
-    } else {
-      if (vNode.belongClassVNode && vNode.belongClassVNode.realNode) {
-        vNode.belongClassVNode.realNode.refs[String(ref)] = instance;
-      }
-    }
-  }
+  handleRef(vNode, ref, vNode.realNode);
 }
 
 function detachRef(vNode: VNode, isOldRef?: boolean) {
   let ref = (isOldRef ? vNode.oldRef : vNode.ref);
 
-  if (ref !== null) {
-    let refType = typeof ref;
+  handleRef(vNode, ref, null);
+}
+
+function handleRef(vNode: VNode, ref, val) {
+  if (ref !== null && ref !== undefined) {
+    const refType = typeof ref;
 
     if (refType === 'function') {
-      try {
-        ref(null);
-      } catch (error) {
-        handleSubmitError(vNode, error);
-      }
+      ref(val);
     } else if (refType === 'object') {
-      (<RefType>ref).current = null;
+      (<RefType>ref).current = val;
     } else {
       if (vNode.belongClassVNode && vNode.belongClassVNode.realNode) {
-        vNode.belongClassVNode.realNode.refs[String(ref)] = null;
+        vNode.belongClassVNode.realNode.refs[String(ref)] = val;
       }
     }
   }
diff --git a/libs/horizon/src/renderer/submit/Submit.ts b/libs/horizon/src/renderer/submit/Submit.ts
index 774c7386..e76f0b97 100644
--- a/libs/horizon/src/renderer/submit/Submit.ts
+++ b/libs/horizon/src/renderer/submit/Submit.ts
@@ -35,13 +35,10 @@ let lastRoot: VNode | null = null;
 
 export function submitToRender(treeRoot) {
   treeRoot.shouldUpdate = treeRoot.childShouldUpdate;
-
-  const startVNode = getStartVNode();
-
   // 置空task，让才能加入新的render任务
   treeRoot.task = null;
 
-  setProcessing(null);
+  const startVNode = getStartVNode();
 
   if (FlagUtils.hasAnyFlag(startVNode)) {
     // 把自己加上
diff --git a/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts b/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
index 185ec51d..4633625f 100644
--- a/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
+++ b/libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts
@@ -2,65 +2,45 @@
  * 浏览器相关实现
  */
 
-export let now;
-
-if (typeof performance === 'object' && typeof performance.now === 'function') {
-  const localPerformance = performance;
-  now = () => localPerformance.now();
-} else {
-  const localDate = Date;
-  const initialTime = localDate.now();
-  now = () => localDate.now() - initialTime;
-}
-
 let isMessageLoopRunning = false;
 let browserCallback = null;
 
-// 默认每次只运行5ms
-const runTime = 5;
-let deadline = 0;
 
 export function isOverTime() {
-  return now() >= deadline;
+  return false;
 }
 
 // 1、设置deadline；2、回调TaskExecutor传过来的browserCallback
 const callRenderTasks = () => {
-  if (browserCallback == null) {
+  if (browserCallback === null) {
     return;
   }
 
-  const currentTime = now();
-  // 计算deadline
-  deadline = currentTime + runTime;
   try {
     // 执行callback
-    const hasMoreTask = browserCallback(
-      currentTime,
-    );
+    const hasMoreTask = browserCallback();
 
     if (!hasMoreTask) { // 没有更多task
       isMessageLoopRunning = false;
       browserCallback = null;
     } else {
       // 还有task，继续调用
-      port.postMessage(null);
+      port2.postMessage(null);
     }
   } catch (error) {
-    port.postMessage(null);
+    port2.postMessage(null);
     throw error;
   }
 };
 
-const channel = new MessageChannel();
-const port = channel.port2;
-channel.port1.onmessage = callRenderTasks;
+const { port1, port2 } = new MessageChannel();
+port1.onmessage = callRenderTasks;
 
 export function requestBrowserCallback(callback) {
   browserCallback = callback;
 
   if (!isMessageLoopRunning) {
     isMessageLoopRunning = true;
-    port.postMessage(null);
+    port2.postMessage(null);
   }
 }
diff --git a/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts b/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
index 125f0a17..0db72fcb 100644
--- a/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
+++ b/libs/horizon/src/renderer/taskExecutor/RenderQueue.ts
@@ -46,9 +46,7 @@ function callRenderQueue() {
     try {
       for (; i < renderQueue.length; i++) {
         let callback = renderQueue[i];
-        do {
-          callback = callback();
-        } while (callback !== null);
+        callback();
       }
       renderQueue = null;
     } catch (error) {
diff --git a/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts b/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
index f5a8b986..fa0a3294 100644
--- a/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
+++ b/libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts
@@ -5,10 +5,9 @@
 import {
   requestBrowserCallback,
   isOverTime,
-  now,
 } from './BrowserAsync';
 
-import {add, shift, first} from './TaskQueue';
+import { add, shift, first, remove } from './TaskQueue';
 
 const ImmediatePriority = 1;
 const NormalPriority = 10;
@@ -16,89 +15,65 @@ const NormalPriority = 10;
 // 用于控制插入任务的顺序
 let idCounter = 1;
 
-let currentPriorityLevel = NormalPriority;
-
 // 正在执行task
 let isProcessing = false;
 
 // 调度中，等待浏览器回调
-let isScheduling = false;
-
-function runSync(callback, priorityLevel = NormalPriority) {
-  const previousPriorityLevel = currentPriorityLevel;
-  currentPriorityLevel = priorityLevel;
-
-  try {
-    return callback();
-  } finally {
-    currentPriorityLevel = previousPriorityLevel;
-  }
-}
+let isWaiting = false;
 
 function runAsync(callback, priorityLevel= NormalPriority ) {
-  let timeout;
+  let increment;
   switch (priorityLevel) {
     case ImmediatePriority:
-      timeout = -1;
+      increment = -1;
       break;
     case NormalPriority:
     default:
-      timeout = 5000;
+      increment = 10000;
       break;
   }
 
   const task = {
     id: idCounter++,
     callback,
-    priorityLevel,
-    expirationTime: now() + timeout,
+    order: idCounter + increment,
   };
 
   add(task);
 
-  if (!isScheduling && !isProcessing) {
-    isScheduling = true;
+  if (!isWaiting && !isProcessing) {
+    isWaiting = true;
     requestBrowserCallback(callTasks);
   }
 
   return task;
 }
 
-function callTasks(initialTime) {
-  isScheduling = false;
+function callTasks() {
+  isWaiting = false;
   isProcessing = true;
 
   let task = null;
-  const previousPriorityLevel = currentPriorityLevel;
   try {
-    let currentTime = initialTime;
     task = first();
 
     // 循环执行task
     while (task !== null) {
-      if (
-        task.expirationTime > currentTime &&
-        isOverTime()
-      ) {
-        // 任务的过期时间大于当前时间（没达到此任务的过期时间）且超过了deadline
+      if (isOverTime()) {
+        // 超过了deadline
         break;
       }
 
       const callback = task.callback;
-      if (typeof callback === 'function') {
+      if (callback !== null) {
         task.callback = null;
-        currentPriorityLevel = task.priorityLevel;
-        const didUserCallbackTimeout = task.expirationTime <= currentTime;
 
-        const continuationCallback = callback(didUserCallbackTimeout);
-        currentTime = now();
-        // 执行callback返回函数，重置callback
-        if (typeof continuationCallback === 'function') {
-          task.callback = continuationCallback;
-        } else {
-          if (task === first()) {
-            shift();
-          }
+        callback();
+
+        if (task === first()) {
+          shift();
+        } else { // 执行任务中可能插入了新任务
+          remove(task);
         }
       } else {
         shift();
@@ -110,8 +85,6 @@ function callTasks(initialTime) {
     // 返回是否还有任务，如果有，说明是被中断了
     return task !== null;
   } finally {
-    task = null;
-    currentPriorityLevel = previousPriorityLevel;
     isProcessing = false;
   }
 }
@@ -120,16 +93,9 @@ function cancelTask(task) {
   task.callback = null;
 }
 
-function getCurrentPriorityLevel() {
-  return currentPriorityLevel;
-}
-
 export {
   ImmediatePriority,
   NormalPriority,
-  runSync,
   runAsync,
   cancelTask,
-  getCurrentPriorityLevel,
-  now,
 };
diff --git a/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts b/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
index 708e9bdf..bfb98f79 100644
--- a/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
+++ b/libs/horizon/src/renderer/taskExecutor/TaskQueue.ts
@@ -5,7 +5,7 @@
 type Queue = Array<Node>;
 type Node = {
   id: number;
-  expirationTime: number;
+  order: number;
 };
 
 // 任务队列
@@ -15,9 +15,7 @@ export function add(node: Node): void {
   // 查找第一个大于等于 value 的下标，都比 value 小则返回 -1
   const idx = getBiggerIdx(node);
 
-  if (idx === 0) {
-    taskQueue.unshift(node);
-  } else if (idx === -1) {
+  if (idx === -1) {
     taskQueue.push(node);
   } else {
     taskQueue.splice(idx, 0, node);
@@ -32,10 +30,11 @@ function getBiggerIdx(node: Node) {
   while (left <= right) {
     const middle = left + ((right - left) >> 1);
 
-    if (compare(taskQueue[middle], node) > 0)
+    if (compare(taskQueue[middle], node) > 0) {
       right = middle - 1;
-    else
+    } else {
       left = middle + 1;
+    }
   }
 
   return (left < taskQueue.length) ? left : -1;
@@ -51,8 +50,12 @@ export function shift(): Node | null {
   return val !== undefined ? val : null;
 }
 
+export function remove(node: Node) {
+  taskQueue.splice(taskQueue.indexOf(node), 1);
+}
+
 function compare(a: Node, b: Node) {
   // 优先先用index排序，其次用id
-  const diff = a.expirationTime - b.expirationTime;
+  const diff = a.order - b.order;
   return diff !== 0 ? diff : a.id - b.id;
 }