diff --git a/package-lock.json b/package-lock.json
index 6d38477..b1d95c3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,7 @@
         "@tauri-apps/plugin-fs": "^2.2.1",
         "@tauri-apps/plugin-opener": "^2",
         "@vavt/v3-extension": "^3.0.0",
+        "js-md5": "^0.8.3",
         "markdown-it-link-attributes": "^4.0.1",
         "md-editor-v3": "^5.5.0",
         "plantuml-encoder": "^1.4.0",
@@ -1949,6 +1950,12 @@
       "integrity": "sha512-dAA1/Zbp4+c5E+ARCVTIuKepXsNLzSYfzvOimiYD4S5eeP9QuplSHLcdhfqFSwyM1o1u6ku6RRRCyaZ0YAjiBw==",
       "license": "ISC"
     },
+    "node_modules/js-md5": {
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/js-md5/-/js-md5-0.8.3.tgz",
+      "integrity": "sha512-qR0HB5uP6wCuRMrWPTrkMaev7MJZwJuuw4fnwAzRgP4J4/F8RwtodOKpGp4XpqsLBFzzgqIO42efFAyz2Et6KQ==",
+      "license": "MIT"
+    },
     "node_modules/linkify-it": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-5.0.0.tgz",
diff --git a/package.json b/package.json
index 301b08b..3705830 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "@tauri-apps/plugin-fs": "^2.2.1",
     "@tauri-apps/plugin-opener": "^2",
     "@vavt/v3-extension": "^3.0.0",
+    "js-md5": "^0.8.3",
     "markdown-it-link-attributes": "^4.0.1",
     "md-editor-v3": "^5.5.0",
     "plantuml-encoder": "^1.4.0",
diff --git a/src/components/LeftSidebar.vue b/src/components/LeftSidebar.vue
index cca2824..019bdfa 100644
--- a/src/components/LeftSidebar.vue
+++ b/src/components/LeftSidebar.vue
@@ -1,11 +1,20 @@
 <template>
-    <SelectFolder :rootPath="rootFolderPath" :nodeDataCallback="appendDataForNode" @update:rootPath="changeRootPath"
-        @folder-selected="showFileTree" />
-    <FolderTree ref="folderTreeRef" :treeData="folderTreeData" :expandLevel="1" :selectedNode="[currentFilePath]"
-        :specifyFileSuffix="['md']" @file-selected="fileSelected" />
+    <Space direction="vertical" style="margin-left: 5px; margin-top: 5px;">
+        <Space>
+            <Button v-if="!loginStatus" type="primary" shape="circle" icon="md-person"
+                @click="showLoginModal = true"></Button>
+            <Button v-else type="error" shape="circle" icon="md-log-out" @click="logout"></Button>
+            <SelectFolder :rootPath="rootFolderPath" :nodeDataCallback="appendDataForNode"
+                @update:rootPath="changeRootPath" @folder-selected="showFileTree" />
+        </Space>
+        <FolderTree ref="folderTreeRef" :treeData="folderTreeData" :expandLevel="1" :selectedNode="[currentFilePath]"
+            :specifyFileSuffix="['md']" @file-selected="fileSelected" />
+    </Space>
+    <UserLogin ref="loginRef" v-model:visible="showLoginModal" v-model:loginStatus="loginStatus"></UserLogin>
 </template>
 
 <script setup>
+import UserLogin from './UI/UserLogin.vue';
 import SelectFolder from './UI/SelectFolder.vue';
 import FolderTree from './UI/FolderTree.vue';
 import { ref } from 'vue';
@@ -30,6 +39,14 @@ const emit = defineEmits([
     'update:rootFolderPath'
 ]);
 
+// 调用登录组件，获取登录状态，以及点击可登出
+const loginRef = ref(null);
+const loginStatus = ref(false);
+const showLoginModal = ref(false);
+const logout = () => {
+    loginRef.value.logout();
+};
+
 const folderTreeRef = ref(null)
 // <SelectFolder> 返回的文件树数据，增加自定义数据，便于传给 <FolderTree> 进行渲染
 function appendDataForNode(nodeData) {
diff --git a/src/components/UI/UserLogin.vue b/src/components/UI/UserLogin.vue
new file mode 100644
index 0000000..20c8099
--- /dev/null
+++ b/src/components/UI/UserLogin.vue
@@ -0,0 +1,248 @@
+<template>
+    <Modal v-model="showFormModal" :footer-hide="true" class="login-modal">
+        <div style="padding-top: 30px;"></div>
+        <Login v-if="signInOrSignUp" @on-submit="handleSignIn">
+            <UserName name="username" />
+            <Password name="password" />
+            <div class="auto-login">
+                <Checkbox v-model="autoLogin" size="large">记住登录状态</Checkbox>
+                <!-- <a>忘记密码</a> -->
+            </div>
+            <Submit />
+            <Space split>还未拥有账号？<Button type="text" @click="signInOrSignUp = false">前往注册</Button></Space>
+        </Login>
+        <Login v-else @on-submit="handleSignUp">
+            <UserName name="username" />
+            <Email name="mail" />
+            <Password name="password" />
+            <Password name="passwordConfirm" placeholder="确认密码" />
+            <Submit>注册</Submit>
+            <Space split>已经拥有账号？<Button type="text" @click="signInOrSignUp = true">前往登录</Button></Space>
+        </Login>
+    </Modal>
+</template>
+
+<script setup>
+import md5 from 'js-md5';
+import { ref, watch, onMounted } from "vue";
+import { Message } from 'view-ui-plus'
+
+const props = defineProps({
+    visible: {
+        type: Boolean,
+        required: true,
+        default: false,
+    },
+    loginStatus: {
+        type: Boolean,
+        required: true,
+        default: false,
+    },
+});
+
+const emit = defineEmits([
+    'update:visible',
+    'update:loginStatus',
+]);
+
+// 是否弹出对话框。要求双向绑定
+const showFormModal = ref(props.visible);
+watch(() => props.visible, (visible) => {
+    showFormModal.value = visible;
+})
+watch(showFormModal, (visible) => {
+    emit('update:visible', visible);
+})
+
+const signInOrSignUp = ref(true);
+const autoLogin = ref(false);
+
+// 由于是跨域登录，需要手动设置并携带 Cookie
+const setPHPSessionToCookie = (sessionID) => {
+    if (sessionID) {
+        document.cookie = `PHPSESSID=${sessionID}; max-age=604800; SameSite=None; secure; path=/`;
+    }
+}
+const getPHPSessionFromCookie = () => {
+    let PHPSESSID = '';
+    const cookies = document.cookie.split('; ');
+    cookies.forEach(cookie => {
+        const [key, value] = cookie.split('=');
+        if (key === 'PHPSESSID') {
+            PHPSESSID = decodeURIComponent(value); // 解码特殊字符（如空格、%20）
+        }
+    });
+    return PHPSESSID;
+}
+const delPHPSessionFromCookie = () => {
+    document.cookie = `PHPSESSID=; expires=Thu, 01 Jan 1970 00:00:00 GMT`;
+}
+
+const handleSignIn = (valid, { username, password }) => {
+    if (valid) {
+        fetch('https://myafei.cn/php/ajax.php', {
+            method: 'POST',
+            body: JSON.stringify({
+                'func': 'login',
+                'username': username,
+                'is_email': /^[0-9a-zA-Z_-]{1,100}$/.test(username) ? false : true,
+                'password': md5(password),
+                'isRemember': autoLogin.value,
+            }),
+        }).then(response => {
+            if (!response.ok) throw new Error(`HTTP 错误: ${response.status}`);
+            return response.json();
+        }).then(data => {
+            if (data.status == 0) {
+                Message.success('登录成功');
+                setPHPSessionToCookie(data.PHPSESSID);
+                // 将登录成功的状态通知父组件
+                emit('update:loginStatus', true);
+                // 关闭对话框
+                showFormModal.value = false;
+            } else {
+                Message.error(data.error);
+            }
+        }).catch(error => {
+            Message.error(`登录发生异常: ${error}`);
+        });
+    }
+};
+
+const handleSignUp = (valid, { username, mail, password, passwordConfirm }) => {
+    if (!valid) {
+        return;
+    }
+    if (passwordConfirm !== password) {
+        Message.error('输入的密码不一致，请重新输入');
+        return;
+    }
+
+    fetch('https://myafei.cn/php/ajax.php', {
+        method: 'POST',
+        body: JSON.stringify({
+            'func': 'register',
+            'username': username,
+            'email': mail,
+            'password': md5(password),
+        }),
+    }).then(response => {
+        if (!response.ok) throw new Error(`HTTP 错误: ${response.status}`);
+        return response.json();
+    }).then(data => {
+        if (data.status == 0) {
+            // 发送邮件
+            sendSignUpEmail(data.id);
+        } else {
+            Message.error(data.error);
+        }
+    }).catch(error => {
+        Message.error(`注册发生异常: ${error}`);
+    });
+};
+
+const sendSignUpEmail = (userID) => {
+    fetch('https://myafei.cn/php/ajax.php', {
+        method: 'POST',
+        body: JSON.stringify({
+            'func': 'resend_email',
+            'id': userID,
+            'path': '/',
+        }),
+    }).then(response => {
+        if (!response.ok) throw new Error(`HTTP 错误: ${response.status}`);
+        return response.json();
+    }).then(data => {
+        if (data.status == 0) {
+            Message.success('请前往邮箱激活账号(没收到的话检查垃圾箱)，激活后再回来登录账号');
+            // 回到登录窗口
+            signInOrSignUp.value = true;
+        } else if (data.status == -100) {
+            Message.warning('邮箱已被激活');
+        } else {
+            Message.error('激活邮件发送失败:' + data.error);
+        }
+    }).catch(error => {
+        Message.error(`邮件发送异常: ${error}`);
+    });
+}
+
+const checkLoginStatus = async () => {
+    // 先从 cookie 中拿到 PHPSESSID
+    const PHPSESSID = getPHPSessionFromCookie();
+    let loginStatus = false;
+    await fetch('https://myafei.cn/php/ajax.php?PHPSESSID=' + PHPSESSID, {
+        method: 'POST',
+        body: JSON.stringify({
+            'func': 'is_login',
+        }),
+    }).then(response => {
+        if (!response.ok) throw new Error(`HTTP 错误: ${response.status}`);
+        return response.json();
+    }).then(data => {
+        if (data.status == 0) {
+            emit('update:loginStatus', true);
+            loginStatus = true;
+        } else {
+            loginStatus = false;
+        }
+    }).catch(error => {
+        Message.error(`检查登录状态时发生异常: ${error}`);
+        loginStatus = false;
+    });
+    return loginStatus;
+}
+
+const logout = async () => {
+    const PHPSESSID = getPHPSessionFromCookie();
+    let logoutStatus = false;
+    await fetch('https://myafei.cn/php/ajax.php?PHPSESSID=' + PHPSESSID, {
+        method: 'POST',
+        body: JSON.stringify({
+            'func': 'logout',
+        }),
+    }).then(response => {
+        if (!response.ok) throw new Error(`HTTP 错误: ${response.status}`);
+        return response.json();
+    }).then(data => {
+        if (data.status == 0) {
+            Message.info('登出成功');
+            delPHPSessionFromCookie();
+            emit('update:loginStatus', false);
+            logoutStatus = true;
+        } else {
+            Message.error(data.error);
+            logoutStatus = false;
+        }
+    }).catch(error => {
+        Message.error(`登出发生异常: ${error}`);
+        logoutStatus = false;
+    });
+    return logoutStatus;
+}
+
+defineExpose({
+    logout,
+})
+
+onMounted(async () => {
+    // 检查是否已登录
+    checkLoginStatus();
+});
+</script>
+
+<style scoped>
+.login-modal {
+    width: 400px;
+    margin: 0 auto !important;
+}
+
+.auto-login {
+    margin-bottom: 24px;
+    text-align: left;
+}
+
+.auto-login a {
+    float: right;
+}
+</style>