diff --git a/src/appdelegate.cpp b/src/appdelegate.cpp
index 57987f9..506506b 100644
--- a/src/appdelegate.cpp
+++ b/src/appdelegate.cpp
@@ -163,3 +163,18 @@ bool AppDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
 
     return QStyledItemDelegate::editorEvent(event, model, option, index);
 }
+
+void AppDelegate::startDownloadForAll() {
+    if (!m_model) return;
+    for (int row = 0; row < m_model->rowCount(); ++row) {
+        QModelIndex index = m_model->index(row, 0);
+        QString packageName = index.data(Qt::UserRole + 1).toString();
+        if (m_downloads.contains(packageName) && m_downloads[packageName].isDownloading)
+            continue; // 跳过正在下载的
+        QString downloadUrl = index.data(Qt::UserRole + 7).toString();
+        QString outputPath = QString("%1/%2.metalink").arg(QDir::tempPath(), packageName);
+        m_downloads[packageName] = {0, true};
+        m_downloadManager->startDownload(packageName, downloadUrl, outputPath);
+        emit updateDisplay(packageName);
+    }
+}
diff --git a/src/appdelegate.h b/src/appdelegate.h
index 37f7a77..9e4ac3a 100644
--- a/src/appdelegate.h
+++ b/src/appdelegate.h
@@ -20,6 +20,7 @@ public:
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     bool editorEvent(QEvent *event, QAbstractItemModel *model,
                      const QStyleOptionViewItem &option, const QModelIndex &index) override;
+    void startDownloadForAll(); // 新增：批量下载所有应用
 
 signals:
     void updateDisplay(const QString &packageName);
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 9b20071..f961afc 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -14,6 +14,9 @@ MainWindow::MainWindow(QWidget *parent)
     listView->setModel(m_model);
     listView->setItemDelegate(m_delegate);
 
+    // 新增：确保 delegate 拥有 model 指针
+    m_delegate->setModel(m_model);
+
     // 设置 QListView 填充 ui->appWidget
     QVBoxLayout *layout = new QVBoxLayout(ui->appWidget);
     layout->addWidget(listView);
@@ -27,6 +30,13 @@ MainWindow::MainWindow(QWidget *parent)
             }
         }
     });
+
+    // 新增：点击“更新全部”按钮批量下载
+    connect(ui->updatePushButton, &QPushButton::clicked, this, [=](){
+        qDebug()<<"更新全部按钮被点击";
+        m_delegate->startDownloadForAll();
+    });
+
     checkUpdates();
     initStyle();
 }