diff --git a/assets/tray_icon_win.ico b/assets/tray_icon_win.ico
new file mode 100644
index 0000000..a26d605
Binary files /dev/null and b/assets/tray_icon_win.ico differ
diff --git a/assets/tray_icon_win.png b/assets/tray_icon_win.png
deleted file mode 100644
index 01223ff..0000000
Binary files a/assets/tray_icon_win.png and /dev/null differ
diff --git a/lib/ui/app_tray.dart b/lib/ui/app_tray.dart
index 4fb90be..d2d3ff9 100644
--- a/lib/ui/app_tray.dart
+++ b/lib/ui/app_tray.dart
@@ -25,7 +25,7 @@ class AppTray with TrayListener, WindowListener {
     await windowManager.setPreventClose(true);
 
     await trayManager.setIcon(
-      Platform.isMacOS ? 'assets/tray_icon_mac.png' : 'assets/tray_icon_win.png',
+      Platform.isMacOS ? 'assets/tray_icon_mac.png' : 'assets/tray_icon_win.ico',
     );
     await trayManager.setToolTip('资安信插件助手 · 饭卡打印（后台运行中）');
     await trayManager.setContextMenu(_menu);
diff --git a/pubspec.yaml b/pubspec.yaml
index c3ce963..3340931 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -71,9 +71,10 @@ flutter:
   uses-material-design: true
 
   # 托盘图标（白底圆盘+logo，深浅菜单栏/任务栏均可见）与侧栏 logo
+  # Windows 托盘必须用 .ico（tray_manager 原生 LoadImage 只认 ico，png 静默失败）
   assets:
     - assets/tray_icon_mac.png
-    - assets/tray_icon_win.png
+    - assets/tray_icon_win.ico
     - assets/logo.png
     # HiTi Mac 驱动安装包（不进 git：放 assets/drivers/*.dmg 后重新打包；缺失时向导降级为官网链接）
     - assets/drivers/
diff --git a/tool/gen_app_icons.dart b/tool/gen_app_icons.dart
index 7e68266..6b9f60a 100644
--- a/tool/gen_app_icons.dart
+++ b/tool/gen_app_icons.dart
@@ -134,8 +134,40 @@ void main(List<String> args) {
 
   Directory('assets').createSync(recursive: true);
   File('assets/tray_icon_mac.png').writeAsBytesSync(encodePng(trayIcon(64)));
-  File('assets/tray_icon_win.png').writeAsBytesSync(encodePng(trayIcon(32)));
-  print('written assets/tray_icon_mac.png / tray_icon_win.png');
+  print('written assets/tray_icon_mac.png');
+  // Windows 托盘必须用 .ico：tray_manager 的原生端 LoadImage(IMAGE_ICON) 只认
+  // ico 文件（传 png 返回 NULL → 图标空占位、任务栏不显示且无任何报错）
+  Uint8List buildIcoFrom(Image Function(int) generator, List<int> sizes) {
+    final pngs = <int, Uint8List>{
+      for (final s in sizes) s: Uint8List.fromList(encodePng(generator(s))),
+    };
+    final b = BytesBuilder();
+    // ICONDIR：reserved=0, type=icon, count
+    b.addByte(0); b.addByte(0); b.addByte(1); b.addByte(0);
+    b.addByte(sizes.length); b.addByte(0);
+    var offset = 6 + 16 * sizes.length;
+    // 目录项全部在前
+    for (final s in sizes) {
+      final png = pngs[s]!;
+      b.addByte(s); b.addByte(s); b.addByte(0); b.addByte(0);
+      b.addByte(1); b.addByte(0); b.addByte(32); b.addByte(0);
+      for (var i = 0; i < 4; i++) {
+        b.addByte((png.length >> (8 * i)) & 0xff);
+      }
+      for (var i = 0; i < 4; i++) {
+        b.addByte((offset >> (8 * i)) & 0xff);
+      }
+      offset += png.length;
+    }
+    // PNG 数据全部在后
+    for (final s in sizes) {
+      b.add(pngs[s]!);
+    }
+    return b.toBytes();
+  }
+  final trayIco = buildIcoFrom(trayIcon, [16, 24, 32]);
+  File('assets/tray_icon_win.ico').writeAsBytesSync(trayIco);
+  print('written assets/tray_icon_win.ico (${trayIco.length} bytes)');
 
   // ---------- 原样 logo ----------
   File('assets/logo.png').writeAsBytesSync(encodePng(logo));