diff --git a/backend/server.js b/backend/server.js
index 9954903..f90e308 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -1066,6 +1066,73 @@ app.post('/api/files/rename', authMiddleware, async (req, res) => {
   }
 });
 
+// 创建文件夹
+app.post('/api/files/mkdir', authMiddleware, async (req, res) => {
+  const { path, folderName } = req.body;
+  let storage;
+
+  // 参数验证
+  if (!folderName || folderName.trim() === '') {
+    return res.status(400).json({
+      success: false,
+      message: '文件夹名称不能为空'
+    });
+  }
+
+  // 文件名安全检查 - 防止路径遍历攻击
+  if (folderName.includes('/') || folderName.includes('\\') || folderName.includes('..') || folderName.includes(':')) {
+    return res.status(400).json({
+      success: false,
+      message: '文件夹名称不能包含特殊字符 (/ \\ .. :)'
+    });
+  }
+
+  // 只允许本地存储创建文件夹
+  if (req.user.current_storage_type !== 'local') {
+    return res.status(400).json({
+      success: false,
+      message: '只有本地存储支持创建文件夹'
+    });
+  }
+
+  try {
+    const { StorageInterface } = require('./storage');
+    const storageInterface = new StorageInterface(req.user);
+    storage = await storageInterface.connect();
+
+    // 构造文件夹路径
+    const basePath = path || '/';
+    const folderPath = basePath === '/' ? `/${folderName}` : `${basePath}/${folderName}`;
+    const fullPath = storage.getFullPath(folderPath);
+
+    // 检查是否已存在
+    if (fs.existsSync(fullPath)) {
+      return res.status(400).json({
+        success: false,
+        message: '文件夹已存在'
+      });
+    }
+
+    // 创建文件夹 (不使用recursive,只创建当前层级)
+    fs.mkdirSync(fullPath, { mode: 0o755 });
+
+    console.log(`[创建文件夹成功] 用户${req.user.id}: ${folderPath}`);
+
+    res.json({
+      success: true,
+      message: '文件夹创建成功'
+    });
+  } catch (error) {
+    console.error('[创建文件夹失败]', error);
+    res.status(500).json({
+      success: false,
+      message: '创建文件夹失败: ' + error.message
+    });
+  } finally {
+    if (storage) await storage.end();
+  }
+});
+
 // 删除文件
 app.post('/api/files/delete', authMiddleware, async (req, res) => {
   const { fileName, path } = req.body;
@@ -1090,7 +1157,7 @@ app.post('/api/files/delete', authMiddleware, async (req, res) => {
 
     res.json({
       success: true,
-      message: '文件删除成功'
+      message: '删除成功'
     });
   } catch (error) {
     console.error('删除文件失败:', error);
diff --git a/backend/storage.js b/backend/storage.js
index 4257508..493ef6f 100644
--- a/backend/storage.js
+++ b/backend/storage.js
@@ -137,16 +137,55 @@ class LocalStorageClient {
   }
 
   /**
-   * 删除文件
+   * 删除文件或文件夹
    */
   async delete(filePath) {
     const fullPath = this.getFullPath(filePath);
     const stats = fs.statSync(fullPath);
 
-    fs.unlinkSync(fullPath);
+    if (stats.isDirectory()) {
+      // 删除文件夹 - 递归删除
+      // 先计算文件夹内所有文件的总大小
+      const folderSize = this.calculateFolderSize(fullPath);
 
-    // 更新已使用空间
-    this.updateUsedSpace(-stats.size);
+      // 删除文件夹及其内容
+      fs.rmSync(fullPath, { recursive: true, force: true });
+
+      // 更新已使用空间
+      if (folderSize > 0) {
+        this.updateUsedSpace(-folderSize);
+      }
+    } else {
+      // 删除文件
+      fs.unlinkSync(fullPath);
+
+      // 更新已使用空间
+      this.updateUsedSpace(-stats.size);
+    }
+  }
+
+  /**
+   * 计算文件夹大小
+   */
+  calculateFolderSize(folderPath) {
+    let totalSize = 0;
+
+    const items = fs.readdirSync(folderPath, { withFileTypes: true });
+
+    for (const item of items) {
+      const itemPath = path.join(folderPath, item.name);
+
+      if (item.isDirectory()) {
+        // 递归计算子文件夹
+        totalSize += this.calculateFolderSize(itemPath);
+      } else {
+        // 累加文件大小
+        const stats = fs.statSync(itemPath);
+        totalSize += stats.size;
+      }
+    }
+
+    return totalSize;
   }
 
   /**
diff --git a/frontend/app.html b/frontend/app.html
index 6de58f6..21cb2f9 100644
--- a/frontend/app.html
+++ b/frontend/app.html
@@ -669,6 +669,9 @@
             <button v-if="storageType === 'local'" class="btn btn-primary" @click="$refs.fileUploadInput.click()">
               <i class="fas fa-upload"></i> 上传文件
             </button>
+            <button v-if="storageType === 'local'" class="btn btn-primary" @click="showCreateFolderModal = true">
+              <i class="fas fa-folder-plus"></i> 新建文件夹
+            </button>
             <!-- SFTP存储：显示下载上传工具按钮 -->
             <button v-else class="btn btn-primary" @click="downloadUploadTool" :disabled="downloadingTool">
               <i :class="downloadingTool ? 'fas fa-spinner fa-spin' : 'fas fa-download'"></i>
@@ -811,6 +814,27 @@
       </div>
     </div>
 
+    <!-- 新建文件夹模态框 -->
+    <div v-if="showCreateFolderModal" class="modal-overlay" @mousedown.self="handleModalMouseDown" @mouseup.self="handleModalMouseUp('showCreateFolderModal')">
+      <div class="modal-content" @click.stop>
+        <h3 style="margin-bottom: 20px;">
+          <i class="fas fa-folder-plus"></i> 新建文件夹
+        </h3>
+        <div class="form-group">
+          <label class="form-label">文件夹名称</label>
+          <input type="text" class="form-input" v-model="createFolderForm.folderName" @keyup.enter="createFolder()" placeholder="请输入文件夹名称" autofocus>
+        </div>
+        <div style="display: flex; gap: 10px; margin-top: 20px;">
+          <button class="btn btn-primary" @click="createFolder()" style="flex: 1;">
+            <i class="fas fa-check"></i> 创建
+          </button>
+          <button class="btn btn-secondary" @click="showCreateFolderModal = false; createFolderForm.folderName = ''" style="flex: 1;">
+            <i class="fas fa-times"></i> 取消
+          </button>
+        </div>
+      </div>
+    </div>
+
     <!-- 分享所有文件模态框 -->
     <div v-if="showShareAllModal" class="modal-overlay" @mousedown.self="handleModalMouseDown" @mouseup.self="handleModalMouseUp('showShareAllModal')">
       <div class="modal-content" @click.stop>
@@ -1674,13 +1698,14 @@
       <div v-if="isPreviewable(contextMenuFile)" class="context-menu-item" @click="contextMenuAction('preview')">
         <i class="fas fa-eye"></i> 预览
       </div>
-      <div class="context-menu-item" @click="contextMenuAction('download')">
+      <!-- 文件夹不显示下载和分享按钮 -->
+      <div v-if="!contextMenuFile.isDirectory" class="context-menu-item" @click="contextMenuAction('download')">
         <i class="fas fa-download"></i> 下载
       </div>
       <div class="context-menu-item" @click="contextMenuAction('rename')">
         <i class="fas fa-edit"></i> 重命名
       </div>
-      <div class="context-menu-item" @click="contextMenuAction('share')">
+      <div v-if="!contextMenuFile.isDirectory" class="context-menu-item" @click="contextMenuAction('share')">
         <i class="fas fa-share"></i> 分享
       </div>
       <div class="context-menu-divider"></div>
diff --git a/frontend/app.js b/frontend/app.js
index 34dc57d..6233545 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -79,6 +79,12 @@ createApp({
         path: ""
       },
 
+      // 创建文件夹
+      showCreateFolderModal: false,
+      createFolderForm: {
+        folderName: ""
+      },
+
       // 上传
       showUploadModal: false,
       uploadProgress: 0,