diff --git a/src/renderer/src/hooks/useGetSubject.js b/src/renderer/src/hooks/useGetSubject.js
index f7882a2..2b61a08 100644
--- a/src/renderer/src/hooks/useGetSubject.js
+++ b/src/renderer/src/hooks/useGetSubject.js
@@ -55,7 +55,7 @@ export const useGetSubject = async () =>{
       treeData = getTreeData(subjectList[0].id)
       // 设置一个默认的curNode
       let curNode
-      if(treeData[0].children){
+      if(treeData[0].children && treeData[0].children.length){
         curNode = treeData[0].children[0]
       }
       else{
diff --git a/src/renderer/src/layout/components/Header.vue b/src/renderer/src/layout/components/Header.vue
index 31d79ea..0b7b6f5 100644
--- a/src/renderer/src/layout/components/Header.vue
+++ b/src/renderer/src/layout/components/Header.vue
@@ -38,7 +38,7 @@
               <span class="user-name">{{ userStore.user.nickName }}</span>
               <div class="flex">
 
-                <el-dropdown @command="changeSubject">
+                <el-dropdown @command="changeSubject" max-height="500">
                   <div class="user-subject">{{ userStore.user.edusubject }}
                     <el-icon class="el-icon--right"><arrow-down />
                     </el-icon>
@@ -178,9 +178,10 @@ const changeSubject = async (command) =>{
     curBook: null, 
     curNode: null, 
     defaultExpandedKeys: [], 
+    subjectTree: []
   }
   sessionStore.set( 'subject', sessionSubject)
-  const { userId, userName, phonenumber, plainpwd  } = userStore.user
+  const { userId, userName, plainpwd  } = userStore.user
   const data = {
     userId,
     userName,
@@ -188,7 +189,7 @@ const changeSubject = async (command) =>{
     edusubject:  command.edusubject
   }
   await updateUserInfo(data)
-  await userStore.login({username: phonenumber ? phonenumber :  userName, password: plainpwd})
+  await userStore.login({username: userName, password: plainpwd})
   await userStore.getInfo()
   router.go()
 }
diff --git a/src/renderer/src/views/profile/userInfo.vue b/src/renderer/src/views/profile/userInfo.vue
index 708da12..2d9d1a2 100644
--- a/src/renderer/src/views/profile/userInfo.vue
+++ b/src/renderer/src/views/profile/userInfo.vue
@@ -47,6 +47,7 @@ import { listEvaluation } from '@/api/subject/index'
 import useUserStore from '@/store/modules/user'
 import {ElMessage} from 'element-plus'
 import { clearBookInfo } from '@/utils/ruoyi'
+import { sessionStore } from '@/utils/store'
 
 const props = defineProps({
   user: {
@@ -148,7 +149,14 @@ function submit() {
           userStore.login({username:props.user.userName,password:props.user.plainpwd}).then(() => {
             userStore.getInfo().then(res => {
               if(res.code === 200){
-                clearBookInfo()
+                let sessionSubject = {
+                  bookList: null, 
+                  curBook: null, 
+                  curNode: null, 
+                  defaultExpandedKeys: [], 
+                  subjectTree: []
+                }
+                sessionStore.set( 'subject', sessionSubject)
                 ElMessage.success('修改成功')
               }else{
                 ElMessage.error(response.msg)