diff --git a/simple-mind-map/src/plugins/Search.js b/simple-mind-map/src/plugins/Search.js
index 58c2a29e..b83f7272 100644
--- a/simple-mind-map/src/plugins/Search.js
+++ b/simple-mind-map/src/plugins/Search.js
@@ -1,4 +1,4 @@
-import { bfsWalk, getTextFromHtml } from '../utils/index'
+import { bfsWalk, getTextFromHtml, isUndef } from '../utils/index'
 
 // 搜索插件
 class Search {
@@ -30,8 +30,8 @@ class Search {
 
   // 搜索
   search(text, callback) {
-    text = String(text).trim()
-    if (!text) return this.endSearch()
+    if (isUndef(text)) return this.endSearch()
+    text = String(text)
     this.isSearching = true
     if (this.searchText === text) {
       // 和上一次搜索文本一样，那么搜索下一个
@@ -89,9 +89,13 @@ class Search {
 
   // 替换当前节点
   replace(replaceText) {
-    replaceText = String(replaceText).trim()
-    if (!replaceText || !this.isSearching || this.matchNodeList.length <= 0)
+    if (
+      isUndef(replaceText) ||
+      !this.isSearching ||
+      this.matchNodeList.length <= 0
+    )
       return
+    replaceText = String(replaceText)
     let currentNode = this.matchNodeList[this.currentIndex]
     if (!currentNode) return
     let text = this.getReplacedText(currentNode, this.searchText, replaceText)
@@ -110,9 +114,13 @@ class Search {
 
   // 替换所有
   replaceAll(replaceText) {
-    replaceText = String(replaceText).trim()
-    if (!replaceText || !this.isSearching || this.matchNodeList.length <= 0)
+    if (
+      isUndef(replaceText) ||
+      !this.isSearching ||
+      this.matchNodeList.length <= 0
+    )
       return
+    replaceText = String(replaceText)
     this.matchNodeList.forEach(node => {
       let text = this.getReplacedText(node, this.searchText, replaceText)
       this.mindMap.renderer.setNodeDataRender(
diff --git a/simple-mind-map/src/utils/index.js b/simple-mind-map/src/utils/index.js
index 886e5385..453f2259 100644
--- a/simple-mind-map/src/utils/index.js
+++ b/simple-mind-map/src/utils/index.js
@@ -465,4 +465,9 @@ export const removeHTMLEntities = (str) => {
 // 获取一个数据的类型
 export const getType = (data) => {
   return Object.prototype.toString.call(data).slice(7, -1)
+}
+
+// 判断一个数据是否是null和undefined和空字符串
+export const isUndef = (data) => {
+  return data === null || data === undefined || data === ''
 }
\ No newline at end of file
diff --git a/web/src/pages/Edit/components/Search.vue b/web/src/pages/Edit/components/Search.vue
index 396ac1fe..70f8870a 100644
--- a/web/src/pages/Edit/components/Search.vue
+++ b/web/src/pages/Edit/components/Search.vue
@@ -15,7 +15,7 @@
         <el-button
           size="small"
           slot="append"
-          v-if="!!searchText.trim()"
+          v-if="!isUndef(searchText)"
           @click="showReplaceInput = true"
           >{{ $t('search.replace') }}</el-button
         >
@@ -49,6 +49,7 @@
 
 <script>
 import { mapState } from 'vuex'
+import { isUndef } from 'simple-mind-map/src/utils/index'
 
 // 搜索替换
 export default {
@@ -74,7 +75,7 @@ export default {
   },
   watch: {
     searchText() {
-      if (!this.searchText.trim()) {
+      if (isUndef(this.searchText)) {
         this.currentIndex = 0
         this.total = 0
         this.showSearchInfo = false
@@ -94,6 +95,8 @@ export default {
     })
   },
   methods: {
+    isUndef,
+    
     hideReplaceInput() {
       this.showReplaceInput = false
       this.replaceText = ''