diff --git a/.env.development b/.env.development
index 2fd45c1..24e34f6 100644
--- a/.env.development
+++ b/.env.development
@@ -1,6 +1,6 @@
 NODE_ENV = developement
 VUE_APP_BASE_NAME = developement
 VUE_APP_BASE_URL = http://localhost:8080
-VUE_APP_NOTE_MAX_COUNT = 409600
-VUE_APP_NOTE_MAX_DESC = 400K
+VUE_APP_NOTE_MAX_COUNT = 131072
+VUE_APP_NOTE_MAX_DESC = 128K
 
diff --git a/.env.production b/.env.production
index fbb661b..a60df30 100644
--- a/.env.production
+++ b/.env.production
@@ -1,5 +1,5 @@
 NODE_ENV = production
 VUE_APP_BASE_NAME = production
 VUE_APP_BASE_URL = https://flagnote.com
-VUE_APP_NOTE_MAX_COUNT = 409600
-VUE_APP_NOTE_MAX_DESC = 400K
\ No newline at end of file
+VUE_APP_NOTE_MAX_COUNT = 131072
+VUE_APP_NOTE_MAX_DESC = 128K
\ No newline at end of file
diff --git a/src/views/EditNote.vue b/src/views/EditNote.vue
index 81b9aeb..e3cef60 100644
--- a/src/views/EditNote.vue
+++ b/src/views/EditNote.vue
@@ -113,10 +113,9 @@
               <Button-group vertical size="large">
                 <Button aria-label="create note" type="error" style="border-radius: 0px;font-size: 24px;"
                   @click="createNote(); switchMenu(); " icon="md-add"></Button>
-                
-                <Button aria-label="crop" v-show="model.showDownloadText" type="error" 
-                 style="border-radius: 0px;font-size: 24px;" @click="saveImage();switchMenu();"
-                 icon="md-crop"></Button>
+
+                <Button aria-label="crop" v-show="model.showDownloadText" type="error"
+                  style="border-radius: 0px;font-size: 24px;" @click="saveImage(); switchMenu();" icon="md-crop"></Button>
 
                 <Button aria-label="download text" v-show="model.showDownloadText" type="error"
                   style="border-radius: 0px;font-size: 24px;" @click="downLoadText(); switchMenu();"
@@ -144,7 +143,7 @@
               :lg="{ span: 18, offset: 3 }" :xl="{ span: 16, offset: 4 }" :xxl="{ span: 16, offset: 4 }">
             <Card :padding="0">
               <Form :model="noteForm" :label-width="80">
-                <div  ref="html2canvas" id="wrapper" style="border-left: 2px solid #ed4014;">
+                <div ref="html2canvas" id="wrapper" style="border-left: 2px solid #ed4014;">
                   <Input element-id="noteText" type="textarea" :border="false" v-model="noteForm.text" autofocus
                     :autosize="{ minRows: 30, maxRows: 409600 }" :placeholder="$t('content.noteTip')" @input="recordText"
                     @on-keydown="recordEventKdown" />
@@ -192,7 +191,7 @@ import { unwrap } from '../libs/secret'
 import { saveNote } from "@/api/note";
 import { getStoreKey } from "@/api/lock";
 import storage from "@/libs/storage";
-import { setStoreText,setNewStoreText } from "@/libs/noteStorage";
+import { setStoreText, setNewStoreText } from "@/libs/noteStorage";
 import { saveAs } from 'file-saver';
 import { isWeixin } from "@/libs/utils";
 import NoteConstant from "@/libs/constants";
@@ -231,12 +230,15 @@ export default {
       toTopState: false,
       showMenuState: false,
       showHeaderShade: false,
-      pageSession: '',
       errorInfo: '',
+      lastEditTime: 0,
+      backStoreTextInterval: null,
+      lastStoreCount: 0,
+      lastStoreTime: 0,
     }
   },
   created() {
-    this.pageSession = new Date().getTime();
+    this.editTime = new Date().getTime();
 
     // read $route
     this.noteForm.key = this.$route.params.name;
@@ -272,7 +274,7 @@ export default {
       // }
 
       storage.local.setText(storeKey, "0|" + this.secret.cipher + "|0|" + this.state.initTime + "|");
-      storage.session.delete(keyMeta.key+".keyMeta");
+      storage.session.delete(keyMeta.key + ".keyMeta");
     } else {
       // second edit
       let noteMeta = this.$route.meta.noteMeta;
@@ -290,6 +292,10 @@ export default {
       }
     }
 
+    this.lastStoreCount = this.noteForm.text.length;
+    this.lastEditTime = new Date().getTime();
+    this.lastStoreTime = this.lastEditTime;
+
     this.bindCtrlAllEvent();
     this.bindToTopEvent();
 
@@ -310,12 +316,15 @@ export default {
     const someOtherEl = document.querySelector('#wrapper');
 
     myObserver.observe(someOtherEl);
+
+    window.addEventListener('beforeunload', e => this.beforeunloadHandler(e))
   },
   updated() {
   },
   beforeDestroy() {
   },
   destroyed() {
+    window.removeEventListener('beforeunload', e => this.beforeunloadHandler(e))
   },
   computed: {},
   watch: {},
@@ -352,7 +361,49 @@ export default {
         return;
       }
 
-      setStoreText(this.noteForm, this.state, this.secret);
+      let nowEditCount = this.noteForm.text.length;
+      let nowEditTime = new Date().getTime();
+
+      if (nowEditCount < 1024) {
+        setStoreText(this.noteForm, this.state, this.secret);
+        this.lastStoreTime = nowEditTime;
+        this.lastStoreCount = nowEditCount;
+      } else {
+        if (null == this.backStoreTextInterval) {
+          this.backStoreTextInterval = window.setInterval(this.backStoreFunction(), 500);
+        }
+      }
+
+      this.lastEditTime = nowEditTime;
+    },
+    backStoreFunction() {
+      let that = this;
+      return function () {
+        that.backStoreText(that);
+      }
+    },
+    backStoreText(that) {
+      let nowEditCount = that.noteForm.text.length;
+      let nowEditTime = new Date().getTime();
+      if (Math.abs(nowEditCount - that.lastStoreCount) > 10) {
+        setStoreText(that.noteForm, that.state, that.secret);
+        that.lastStoreTime = that.lastEditTime;
+        that.lastStoreCount = nowEditCount;
+      } else {
+        if (nowEditTime - that.lastEditTime >= 1000 && nowEditTime - that.lastEditTime < 20000) {
+          if (that.lastEditTime != that.lastStoreTime) {
+            setStoreText(that.noteForm, that.state, that.secret);
+            that.lastStoreTime = that.lastEditTime;
+            that.lastStoreCount = nowEditCount;
+          }
+        } else if (nowEditTime - that.lastEditTime >= 20000) {
+          if (that.backStoreTextInterval != null) {
+            let ivl = that.backStoreTextInterval;
+            that.backStoreTextInterval = null;
+            window.clearInterval(ivl);
+          }
+        }
+      }
     },
     // recordEventKup(event) {
     // let tn = event.currentTarget.value;
@@ -392,7 +443,7 @@ export default {
         }
 
         this.noteForm.text = event.currentTarget.value;
-        setStoreText(this.noteForm, this.state, this.secret);
+        this.recordText();
 
       } else if (event.ctrlKey && (event.which == 13)) {
         //save
@@ -439,16 +490,16 @@ export default {
 
           that.state.commited = 1;
           setStoreText(this.noteForm, this.state, this.secret);
-          
+
           location.reload();
           this.state.locking = 0;
         } else {
           alert(res.data.code);
           this.model.submitting = false;
           this.state.locking = 0;
-          if(res.data.code=="100013"||res.data.code=="800001"){
+          if (res.data.code == "100013" || res.data.code == "800001") {
             let key = setNewStoreText(this.noteForm);
-            location.href="/"+key;
+            location.href = "/" + key;
           }
 
         }
@@ -511,24 +562,24 @@ export default {
 
       let that = this;
       let a = document.createElement('a');
-      html2canvas(canvasID,{
-        scale: 1, 
-        windowWidth: parseInt(document.getElementById("noteText").offsetWidth)+2,
+      html2canvas(canvasID, {
+        scale: 1,
+        windowWidth: parseInt(document.getElementById("noteText").offsetWidth) + 2,
         onclone: (clonedDocument) => {
           let nt = clonedDocument.getElementById("noteText");
           const div = clonedDocument.createElement('div')
           div.innerText = nt.value
 
-          div.style.color="black";
+          div.style.color = "black";
           div.style.padding = "10px";
           div.style.textAlign = "left";
           div.style.wordBreak = "break-word";
           div.style.whiteSpace = "pre-wrap";
           div.style.verticalAlign = "top";
-          div.style.fontSize ="15px";
-          div.style.width= "100%";
-          div.style.border="0px";
-          div.style.fontFamily="'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif";
+          div.style.fontSize = "15px";
+          div.style.width = "100%";
+          div.style.border = "0px";
+          div.style.fontFamily = "'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif";
 
           nt.style.display = 'none'
 
@@ -550,6 +601,9 @@ export default {
         document.body.removeChild(a);
       });
     },
+    beforeunloadHandler() {
+      this.recordText();
+    },
   }
 }
 </script>
diff --git a/vue.config.js b/vue.config.js
index d7fd4fe..5de2b97 100644
--- a/vue.config.js
+++ b/vue.config.js
@@ -6,10 +6,10 @@ module.exports = defineConfig({
 
   assetsDir: 'static',
   productionSourceMap: false,
-  
+
   configureWebpack: (config) => {
-    config.experiments = { asyncWebAssembly: true,syncWebAssembly:true }
-    
+    config.experiments = { asyncWebAssembly: true, syncWebAssembly: true }
+
 
     config.externals = {
       'vue': 'Vue',
@@ -24,8 +24,8 @@ module.exports = defineConfig({
       "file-saver": 'saveAs',
       "clipboard": "ClipboardJS",
       "vue-i18n": "VueI18n",
-      "html2canvas":"html2canvas",
-      "wasm_flate":"wasm_flate"
+      "html2canvas": "html2canvas",
+      "wasm_flate": "wasm_flate"
     };
 
     // 为生产环境修改配置
@@ -68,7 +68,7 @@ module.exports = defineConfig({
     proxy: {
       "/note": {
         target: "https://flagnote.com/", // 后台接口域名
-//        target: "http://localhost:10000/", // 后台接口域名
+        //        target: "http://localhost:10000/", // 后台接口域名
         secure: false, // 如果是https接口，需要配置这个参数
         changeOrigin: true, //是否跨域
         pathRewrite: {