diff --git a/simple-mind-map/index.js b/simple-mind-map/index.js
index 5c20049b..69dce84f 100644
--- a/simple-mind-map/index.js
+++ b/simple-mind-map/index.js
@@ -214,7 +214,14 @@ class MindMap {
     this.svg.size(this.width, this.height)
     if (oldWidth !== this.width || oldHeight !== this.height) {
       // 如果画布宽高改变了需要触发一次渲染
-      this.render()
+      if (this.demonstrate) {
+        // 如果存在演示插件，并且正在演示中，那么不需要触发重新渲染，否则会冲突
+        if (!this.demonstrate.isInDemonstrate) {
+          this.render()
+        }
+      } else {
+        this.render()
+      }
     }
     this.emit('resize')
   }
diff --git a/simple-mind-map/src/core/render/Render.js b/simple-mind-map/src/core/render/Render.js
index a8f68bfc..5b3d3e15 100644
--- a/simple-mind-map/src/core/render/Render.js
+++ b/simple-mind-map/src/core/render/Render.js
@@ -2011,6 +2011,7 @@ class Render {
 
   // 根据uid找到对应的节点实例
   findNodeByUid(uid) {
+    if (!this.root) return
     let res = null
     walk(this.root, null, node => {
       if (node.getData('uid') === uid) {
diff --git a/simple-mind-map/src/plugins/Demonstrate.js b/simple-mind-map/src/plugins/Demonstrate.js
index b43382f6..7d557d77 100644
--- a/simple-mind-map/src/plugins/Demonstrate.js
+++ b/simple-mind-map/src/plugins/Demonstrate.js
@@ -22,6 +22,8 @@ const defaultConfig = {
 class Demonstrate {
   constructor(opt) {
     this.mindMap = opt.mindMap
+    // 是否正在演示中
+    this.isInDemonstrate = false
     // 演示的步骤列表
     this.stepList = []
     // 当前所在步骤
@@ -57,6 +59,7 @@ class Demonstrate {
   }
 
   _enter() {
+    this.isInDemonstrate = true
     // 如果开启了性能模式，那么需要暂停
     this.pausePerformanceMode()
     // 添加演示用的临时的样式
@@ -74,8 +77,16 @@ class Demonstrate {
     // 计算步骤数据
     this.getStepList()
     // 收起所有节点
+    let wait = false
+    if (this.mindMap.renderer.isRendering) {
+      wait = true
+    }
     this.mindMap.execCommand('UNEXPAND_ALL', false)
     const onRenderEnd = () => {
+      if (wait) {
+        wait = false
+        return
+      }
       this.mindMap.off('node_tree_render_end', onRenderEnd)
       // 聚焦到第一步
       this.jump(this.currentStepIndex)
@@ -102,6 +113,7 @@ class Demonstrate {
     this.mindMap.keyCommand.recovery()
     this.restorePerformanceMode()
     this.mindMap.emit('exit_demonstrate')
+    this.isInDemonstrate = false
   }
 
   // 暂停性能模式
diff --git a/simple-mind-map/src/utils/index.js b/simple-mind-map/src/utils/index.js
index aca748e4..67b913dd 100644
--- a/simple-mind-map/src/utils/index.js
+++ b/simple-mind-map/src/utils/index.js
@@ -1505,6 +1505,7 @@ export const fullScreen = element => {
 
 // 退出全屏
 export const exitFullScreen = () => {
+  if (!document.fullscreenElement) return
   if (document.exitFullscreen) {
     document.exitFullscreen()
   } else if (document.webkitExitFullscreen) {