diff --git a/src/renderer/src/components/choose-textbook/index.vue b/src/renderer/src/components/choose-textbook/index.vue
index 5b5cf59..64b8c56 100644
--- a/src/renderer/src/components/choose-textbook/index.vue
+++ b/src/renderer/src/components/choose-textbook/index.vue
@@ -2,12 +2,12 @@
   <div class="book-wrap">
     <el-scrollbar height="100%">
       <div class="book-name flex" @click="dialogVisible = true">
-        <span>{{ curBookName }}</span>
+        <span>{{ curBook.data.itemtitle }}</span>
         <i class="iconfont icon-xiangyou"></i>
       </div>
       <div class="book-list" v-loading="treeLoading">
-        <el-tree ref="refTree" :data="treeData" accordion :props="defaultProps" node-key="id"
-          :default-expanded-keys="defaultExpandedKeys" :current-node-key="currentNodeId" highlight-current
+        <el-tree :data="treeData" accordion :props="defaultProps" node-key="id"
+          :default-expanded-keys="defaultExpandedKeys" :current-node-key="curNode.data.id" highlight-current
           @node-click="handleNodeClick">
           <template #default="{ node }">
             <span :title="node.label" class="tree-label">{{ node.label }}</span>
@@ -28,7 +28,7 @@
 
     <div class="textbook-container">
       <el-scrollbar height="450px">
-        <div class="textbook-item flex" v-for="item in subjectList" :class="curBookId == item.id ? 'active-item' : ''"
+        <div class="textbook-item flex" v-for="item in subjectList" :class="curBook.data.id == item.id ? 'active-item' : ''"
           :key="item.id" @click="changeBook(item)">
           <img v-if="item.avartar" :src="BaseUrl + item.avartar" class="textbook-img" alt="">
           <div v-else class="textbook-img">
@@ -43,166 +43,70 @@
 
 <script setup>
 import { onMounted, ref, nextTick, toRaw, reactive } from 'vue';
-import useUserStore from '@/store/modules/user'
-import { listEvaluation } from '@/api/subject'
+import { cloneDeep } from 'lodash'
+import { useGetSubject } from '@/hooks/useGetSubject'
 
 const BaseUrl = import.meta.env.VITE_APP_BUILD_BASE_PATH
 // 定义要发送的emit事件
 const emit = defineEmits(['nodeClick', 'changeBook'])
-// store
-const userStore = useUserStore()
-const { edustage, edusubject, userId } = userStore.user
-//
+let useSubject = null
 const subjectList = ref([])
-const evaluationList = ref([])
 const dialogVisible = ref(false)
 // 当前教材下面单元内容数据
 const treeData = ref([])
 const defaultProps = {
   children: 'children',
-  label: 'label',
+  label: 'itemtitle',
   class: 'textbook-tree'
 }
-
-const treeLoading = ref(false)
-//当前教材ID
-const curBookId = ref(-1)
-//当前教材名称
-const curBookName = ref('')
-//当前教材封面图
-const curBookImg = ref('')
-//当前教材文件路径
-const curBookPath = ref('')
-// 上册
-const volumeOne = ref([])
-//
-const volumeTwo = ref([])
-
+// 当前选中的教材
+const curBook = reactive({
+  data: {}
+})
 // 当前节点
-const currentNode = reactive({
+const curNode = reactive({
   data:{}
 })
-// 当前选中的节点ID
-const currentNodeId = ref(0)
-// 当前选中的节点名称
-const currentNodeName = ref('')
+const treeLoading = ref(false)
 // 默认展开的节点
 const defaultExpandedKeys = ref([])
-// tree
-const refTree = ref(null)
-
-
-//获取教材下面的单元 + 章节
-const getSubjectContent = async () => {
-  treeLoading.value = true
-  const params = {
-    edusubject,
-    edustage,
-    // entpcourseedituserid: userId,
-    itemgroup: 'textbook',
-    orderby: 'orderidx asc',
-    pageSize: 10000
-  }
-
-
-  if(localStorage.getItem('evaluationList')){
-    evaluationList.value = JSON.parse(localStorage.getItem('evaluationList'))
-  }
-  else{
-    localStorage.removeItem('defaultExpandedKeys')
-    localStorage.removeItem('currentNodeId')
-    const { rows } = await listEvaluation(params)
-    localStorage.setItem('evaluationList', JSON.stringify(rows))
-    evaluationList.value = rows
-  }
- 
-  treeLoading.value = false
-
-  //获取教材版本
-  await getSubject()
-  //上册
-  /**
-   * 不区分上下册
-   * 2024/08/20调整
-   */
-  // volumeOne.value = data.filter(item => item.level == 1 && item.semester == '上册')
-  // volumeTwo.value = data.filter(item => item.level == 1 && item.semester == '下册')
-  getTreeData()
-}
 
 //选择教材
-const changeBook = ({ id, itemtitle, avartar, fileurl }) => {
-  curBookId.value = id
-  curBookName.value = itemtitle
-  curBookImg.value = BaseUrl + avartar
-  curBookPath.value = fileurl
+const changeBook = (data) => {
+  curBook.data = data
 
-  localStorage.removeItem('defaultExpandedKeys')
-  localStorage.removeItem('currentNodeId')
-  localStorage.setItem('curBook', JSON.stringify({id, itemtitle, avartar, fileurl}))
-  getTreeData()
+  localStorage.setItem('curBook', JSON.stringify(data))
+  treeData.value = useSubject.getTreeData(data.id)
+
+  //切换教材后默认展开第一个并选中
+  nextTick(() =>{
+    defaultExpandedKeys.value = [treeData.value[0].id]
+    curNode.data = getLastLevelData(treeData.value)[0]
+
+    localStorage.setItem('defaultExpandedKeys', JSON.stringify(defaultExpandedKeys.value))
+    localStorage.setItem('curNode',JSON.stringify(curNode.data))
+    emitChangeBook()
+  })
+  // 延迟关闭 视觉上选中
   setTimeout(() => {
     dialogVisible.value = false
   }, 100);
 }
 
-const getTreeData = () => {
-  //数据过滤
-  let upData = transData(evaluationList.value)
-
-  if(upData.length){
-    treeData.value = [...upData]
-  }
-  else{
-    treeData.value = []
-    return
-  }
-  nextTick(() => {
-
-    let defaultCurNodeId = localStorage.getItem('currentNodeId')
-    if(defaultCurNodeId){
-      defaultCurNodeId = JSON.parse(defaultCurNodeId)
-      const data = findNode(defaultCurNodeId)
-      currentNode.data = findNode(defaultCurNodeId)
-      currentNodeId.value = data.id
-      currentNodeName.value = data.label
-    }
-    else{
-      defaultExpandedKeys.value = [treeData.value[0].id]
-      currentNode.data = getLastLevelData(treeData.value)[0]
-      currentNodeId.value = getLastLevelData(treeData.value)[0].id
-      currentNodeName.value = getLastLevelData(treeData.value)[0].label
-    }
-    
-    emitChangeBook()
-  })
-
-}
-
-const emitChangeBook = () => {
-  let curNode = {
-    id: currentNodeId.value,
-    label: currentNodeName.value,
-    itemtitle: currentNode.data.itemtitle,
-    edudegree: currentNode.data.edudegree,
-    edustage: currentNode.data.edustage,
-    edusubject: currentNode.data.edusubject,
-  }
-  let parentNode = findParentByChildId(treeData.value, currentNodeId.value)
-  curNode.parentNode = toRaw(parentNode)
 
+const emitChangeBook = async () => {
+  let curData = cloneDeep(toRaw(curNode.data))
+  let parentNode = findParentByChildId(treeData.value, curNode.id)
+  curData.parentNode = toRaw(parentNode)
   const data = {
     textBook: {
-      curBookId: curBookId.value,
-      curBookName: curBookName.value,
-      curBookImg: curBookImg.value,
-      curBookPath: curBookPath.value
+      curBookId: curBook.data.id,
+      curBookName: curBook.data.itemtitle,
+      curBookImg: BaseUrl + curBook.data.avartar,
+      curBookPath: curBook.data.fileurl
     },
-    node: curNode
+    node: curData
   }
-
-  localStorage.setItem('defaultExpandedKeys', JSON.stringify(defaultExpandedKeys.value))
-  localStorage.setItem('currentNodeId', JSON.stringify(currentNodeId.value))
   emit('changeBook', data)
 }
 
@@ -250,122 +154,77 @@ const findParentByChildId = (treeData, targetNodeId) => {
   return null;
 }
 
-const findNode = (id) =>{
-  if(!id) return
-  return evaluationList.value.find( item => item.id == id)
-}
-
-const transData = (data) => {
-  let ary = []
-  data.forEach(item => {
-    let obj = {}
-    // 根据当前教材ID 过滤出对应的单元、章节
-    if (item.rootid == curBookId.value) {
-      if(item.level == 1){
-        obj.label = item.itemtitle
-        obj.id = item.id
-        obj.itemtitle = item.itemtitle
-        obj.edudegree = item.edudegree
-        obj.edustage = item.edustage
-        obj.edusubject = item.edusubject
-        let ary2 = []
-        evaluationList.value.forEach(el => {
-          let obj2 = {}
-          if (item.id == el.parentid) {
-            obj2 = {
-              label: el.itemtitle,
-              id: el.id,
-              itemtitle : el.itemtitle,
-              edudegree : el.edudegree,
-              edustage : el.edustage,
-              edusubject : el.edusubject,
-            }
-            ary2.push(obj2)
-          }
-          obj.children = ary2
-        })
-        ary.push(obj)
-      }
-    }
-  })
-  return ary
-}
-
-//获取教材
-const getSubject = async () => {
-  if(localStorage.getItem('subjectList')){
-    subjectList.value = JSON.parse(localStorage.getItem('subjectList'))
-  }
-  else{
-    const { rows } = await listEvaluation({ itemkey: "version", edusubject, edustage,  pageSize: 10000,orderby: 'orderidx asc', })
-
-    // subjectList.value = rows.filter(item => item.edustage == edustage && item.edusubject == edusubject)
-    subjectList.value = rows
-    localStorage.setItem('subjectList', JSON.stringify(subjectList.value))
-  }
-
-  // 默认第一个
-  if(!subjectList.value.length) return
-  let curBook = localStorage.getItem('curBook')
-  if(curBook){
-    curBook = JSON.parse(curBook)
-    curBookName.value = curBook.itemtitle
-    curBookId.value = curBook.id
-    curBookImg.value = BaseUrl + curBook.avartar
-    curBookPath.value = curBook.fileurl
-  }
-  else{
-    curBookName.value = subjectList.value[0].itemtitle
-    curBookId.value = subjectList.value[0].id
-    curBookImg.value = BaseUrl + subjectList.value[0].avartar
-    curBookPath.value = subjectList.value[0].fileurl
-    localStorage.setItem('curBookId', curBookId.value)
-  }
-}
-
-
-const isHaveUnit = (id) => {
-  return evaluationList.value.some(item => {
-    return item.rootid == id
-  })
-}
-
 
 const handleNodeClick = (data, node) => {
   /**
    * data : 当前节点数据
    * node : 当前节点对象 包含当前节点所有数据  parent属性 指向父节点Node对象
    */
-
-  const nodeData = data;
+  const nodeData = cloneDeep(toRaw(data));
   const parentNode = node.parent.data;
-
+  // parentNode 为数组 则点击的是一级节点
   if (Array.isArray(parentNode)) {
+    // 
     nodeData.parentNode = null
   }
   else {
+    // 否则 点击的为二级节点 parentNode 为它的父级节点
     nodeData.parentNode = parentNode
   }
 
   let curData = {
     textBook: {
-      curBookId: curBookId.value,
-      curBookName: curBookName.value,
-      curBookImg: curBookImg.value,
-      curBookPath: curBookPath.value
+      curBookId: curBook.data.id,
+      curBookName: curBook.data.itemtitle,
+      curBookImg: BaseUrl + curBook.data.avartar,
+      curBookPath: curBook.data.fileurl
     },
     node: toRaw(nodeData)
   }
-  currentNode.data = curData
-
-  localStorage.setItem('defaultExpandedKeys', nodeData.parentNode ? JSON.stringify([parentNode.id]) : JSON.stringify([data.id]))
-  localStorage.setItem('currentNodeId', JSON.stringify(data.id))
-
+  localStorage.setItem('defaultExpandedKeys', parentNode ? JSON.stringify([parentNode.id]) : JSON.stringify([data.id]))
+  localStorage.setItem('curNode', JSON.stringify(nodeData))
   emit('nodeClick', curData)
 
 }
-onMounted(() => {
-  getSubjectContent()
+onMounted( async () => {
+  treeLoading.value = true
+
+  try{
+    useSubject = await useGetSubject()
+    subjectList.value = useSubject.subjectList
+
+    let book = localStorage.getItem('curBook')
+    if(book){
+      book = JSON.parse(book)
+      curBook.data = book
+      treeData.value = useSubject.getTreeData(book.id)
+    }
+    else{
+      curBook.data = useSubject.subjectList[0]
+      treeData.value = useSubject.treeData
+    }
+    // 设置展开并选中
+    nextTick(() =>{
+      // 取缓存
+      let node = localStorage.getItem('curNode')
+      if(node){
+        curNode.data = JSON.parse(node)
+        defaultExpandedKeys.value = JSON.parse(localStorage.getItem('defaultExpandedKeys'))
+      }
+      else{
+        defaultExpandedKeys.value = [treeData.value[0].id]
+        curNode.data = getLastLevelData(treeData.value)[0]
+        //缓存记录当前展开以及选中节点
+        localStorage.setItem('defaultExpandedKeys', JSON.stringify(defaultExpandedKeys.value))
+        localStorage.setItem('curNode', JSON.stringify(curNode.data))
+      }
+      emitChangeBook()
+    })
+  
+  } finally{
+    treeLoading.value = false
+  }
+
 })
 
 </script>
diff --git a/src/renderer/src/components/move-file/index.vue b/src/renderer/src/components/move-file/index.vue
index f2fec19..6689e4a 100644
--- a/src/renderer/src/components/move-file/index.vue
+++ b/src/renderer/src/components/move-file/index.vue
@@ -137,7 +137,7 @@ const getSubjectContent = async () => {
 }
 
 const getSubject = async () => {
-  subjectList.value = JSON.parse(localStorage.getItem('subjectList'))
+
 
   if (localStorage.getItem('subjectList')) {
     subjectList.value = JSON.parse(localStorage.getItem('subjectList'))
diff --git a/src/renderer/src/hooks/useGetSubject.js b/src/renderer/src/hooks/useGetSubject.js
new file mode 100644
index 0000000..e164e3e
--- /dev/null
+++ b/src/renderer/src/hooks/useGetSubject.js
@@ -0,0 +1,82 @@
+import { ref } from 'vue'
+import useUserStore from '@/store/modules/user'
+import { listEvaluation } from '@/api/subject'
+
+export const useGetSubject = async () =>{
+
+  // user store
+  const userStore = useUserStore()
+  const { edustage, edusubject, userId } = userStore.user
+  const BaseUrl = import.meta.env.VITE_APP_BUILD_BASE_PATH
+  // 章节List
+  const unitList = ref([])
+  // 教材List
+  let subjectList = null
+  // 单元章节树结构
+  let treeData = null
+
+
+  // 根据 学科 + 学段 获取所有单元章节 
+  const getSubjectUnit = async () =>{
+    let strUnit = localStorage.getItem('unitList')
+    if(strUnit){
+      unitList.value = JSON.parse(strUnit)
+    }
+    else{
+      const unitParams = {
+        edusubject,
+        edustage,
+        itemgroup: 'textbook',
+        orderby: 'orderidx asc',
+        pageSize: 10000
+      }
+      const { rows } = await listEvaluation(unitParams)
+      unitList.value = rows
+      localStorage.setItem('unitList', JSON.stringify(rows))
+    }
+   
+    await getSubject()
+  }
+
+  // 获取 学科 + 学段 获取教材
+  const getSubject = async () =>{
+
+    let strSubject = localStorage.getItem('subjectList')
+    if(strSubject){
+      subjectList = JSON.parse(strSubject)
+    }
+    else{
+      const subjectParams = { 
+        itemkey: "version",
+        edusubject,
+        edustage,
+        pageSize: 10000,
+        orderby: 'orderidx asc'
+      }
+      const { rows } = await listEvaluation(subjectParams)
+      subjectList = rows
+      localStorage.setItem('subjectList', JSON.stringify(rows))
+    }
+  
+    // 默认选中第一个教材
+    if(subjectList && subjectList.length){
+      treeData = getTreeData(subjectList[0].id)
+    }
+  }
+
+  // 单元章节数据转为“树”结构
+  const getTreeData = (bookId) =>{
+    // 根据当前教材的id 查找出对应的章节 
+    let data = unitList.value.filter(item => item.rootid == bookId && item.level == 1)       
+    data.forEach( item => {
+      item.children = unitList.value.filter( item2 => item2.parentid == item.id && item2.level == 2)
+    }) 
+    return data
+
+  }
+
+  await getSubjectUnit()
+
+  return { subjectList, treeData, getTreeData }
+
+}
\ No newline at end of file
diff --git a/src/renderer/src/layout/components/Header.vue b/src/renderer/src/layout/components/Header.vue
index e9b53c6..5e3ad3a 100644
--- a/src/renderer/src/layout/components/Header.vue
+++ b/src/renderer/src/layout/components/Header.vue
@@ -37,7 +37,7 @@
             <div class="user-info flex">
               <span class="user-name">{{ userStore.user.nickName }}</span>
               <div class="flex">
-                <div class="user-depname">{{ userStore.user.deptName }}</div>
+                
                 <el-dropdown @command="changeSubject">
                   <div class="user-subject">{{ userStore.user.edusubject }}
                     <el-icon class="el-icon--right"><arrow-down />
@@ -52,6 +52,7 @@
                   </template>
                 </el-dropdown>
               </div>
+              <div class="user-depname">{{ userStore.user.deptName }}</div>
             </div>
           </div>
 
@@ -72,6 +73,7 @@ import { updateUserInfo } from '@/api/system/user'
 import outLink from '@/utils/linkConfig'
 import logoIco from '@/assets/images/logo.png'
 import { listEvaluation } from '@/api/classManage/index'
+import { clearBookInfo } from '@/utils/ruoyi'
 
 const { ipcRenderer } = window.electron || {}
 const userStore = useUserStore()
@@ -190,6 +192,7 @@ function setLayout() {
 }
 // 切换学科
 const changeSubject = async (command) =>{
+  clearBookInfo()
   const { userId, userName, phonenumber, plainpwd  } = userStore.user
   const data = {
     userId,
@@ -200,8 +203,6 @@ const changeSubject = async (command) =>{
   await updateUserInfo(data)
   await userStore.login({username: phonenumber, password: plainpwd})
   await userStore.getInfo()
-  localStorage.removeItem('subjectList')
-  localStorage.removeItem('evaluationList')
   router.go()
 }
 
@@ -331,7 +332,7 @@ onMounted(() => {
       justify-content: space-around;
 
       .user-depname {
-        margin-right: 5px;
+        margin-right: 0;
       }
 
       .user-subject {
@@ -351,8 +352,8 @@ onMounted(() => {
     align-items: center;
 
     .user-avatar {
-      width: 35px;
-      height: 35px;
+      width: 45px;
+      height: 45px;
       border-radius: 10px;
       margin-right: 10px;
     }
diff --git a/src/renderer/src/utils/ruoyi.js b/src/renderer/src/utils/ruoyi.js
index e51b433..8d7971e 100644
--- a/src/renderer/src/utils/ruoyi.js
+++ b/src/renderer/src/utils/ruoyi.js
@@ -257,3 +257,17 @@ export const getFileName = (filename) => {
   if(!filename) return
   return filename.replace(/\.[^/.]+$/, "");
 }
+
+// 清除当前选中的教材 章节 相关信息
+export const clearBookInfo = () =>{
+  //当前选中的教材
+  localStorage.removeItem('curBook')
+  // 当前选中的节点
+  localStorage.removeItem('curNode')
+  // 所有章节单元数据
+  localStorage.removeItem('unitList')
+  // 所有教材数据
+  localStorage.removeItem('subjectList')
+  // 展开的节点
+  localStorage.removeItem('defaultExpandedKeys')
+}
\ No newline at end of file
diff --git a/src/renderer/src/views/profile/userInfo.vue b/src/renderer/src/views/profile/userInfo.vue
index 158392d..18e7dc5 100644
--- a/src/renderer/src/views/profile/userInfo.vue
+++ b/src/renderer/src/views/profile/userInfo.vue
@@ -45,6 +45,7 @@ import {updateUserInfo } from '@/api/system/user'
 import { listEvaluation } from '@/api/subject/index'
 import useUserStore from '@/store/modules/user'
 import {ElMessage} from 'element-plus'
+import { clearBookInfo } from '@/utils/ruoyi'
 
 const props = defineProps({
   user: {
@@ -137,8 +138,7 @@ function submit() {
           userStore.login({username:props.user.userName,password:props.user.plainpwd}).then(() => {
             userStore.getInfo().then(res => {
               if(res.code === 200){
-                localStorage.removeItem('subjectList')
-                localStorage.removeItem('evaluationList')
+                clearBookInfo()
                 ElMessage.success('修改成功')
               }else{
                 ElMessage.error(response.msg)
diff --git a/src/renderer/src/views/tool/components/lesson.vue b/src/renderer/src/views/tool/components/lesson.vue
index 75241ae..a111467 100644
--- a/src/renderer/src/views/tool/components/lesson.vue
+++ b/src/renderer/src/views/tool/components/lesson.vue
@@ -38,7 +38,7 @@ const curBookId = ref('')
 const evaluationList = ref([])
 
 const getTreeData = () => {
-  evaluationList.value = JSON.parse(localStorage.getItem('evaluationList'))
+  evaluationList.value = JSON.parse(localStorage.getItem('unitList'))
 
     //上册
         /**