diff --git a/app/Events/ScreenCleared.php b/app/Events/ScreenCleared.php
new file mode 100644
index 0000000..d8451ae
--- /dev/null
+++ b/app/Events/ScreenCleared.php
@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * 文件功能：管理员全员清屏广播事件
+ *
+ * 管理员触发清屏后，广播给房间内所有用户，前端监听后清除聊天记录（悄悄话除外）。
+ *
+ * @author   ChatRoom Laravel
+ *
+ * @version  1.0.0
+ */
+
+namespace App\Events;
+
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Broadcasting\PresenceChannel;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class ScreenCleared implements ShouldBroadcast
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    /**
+     * 构造函数
+     *
+     * @param  int  $roomId  房间ID
+     * @param  string  $operator  执行清屏的管理员用户名
+     */
+    public function __construct(
+        public readonly int $roomId,
+        public readonly string $operator,
+    ) {}
+
+    /**
+     * 广播频道
+     *
+     * @return array<int, \Illuminate\Broadcasting\Channel>
+     */
+    public function broadcastOn(): array
+    {
+        return [
+            new PresenceChannel('room.'.$this->roomId),
+        ];
+    }
+
+    /**
+     * 广播数据
+     *
+     * @return array<string, mixed>
+     */
+    public function broadcastWith(): array
+    {
+        return [
+            'operator' => $this->operator,
+        ];
+    }
+}
diff --git a/app/Http/Controllers/AdminCommandController.php b/app/Http/Controllers/AdminCommandController.php
index ee0c4da..efbaf90 100644
--- a/app/Http/Controllers/AdminCommandController.php
+++ b/app/Http/Controllers/AdminCommandController.php
@@ -323,6 +323,39 @@ class AdminCommandController extends Controller
         return response()->json(['status' => 'success', 'message' => '公告已发送']);
     }
 
+    /**
+     * 管理员全员清屏
+     *
+     * 清除 Redis 中该房间的聊天记录缓存，并广播清屏事件通知所有用户前端清除消息。
+     * 前端只清除普通消息，保留悄悄话。
+     *
+     * @param  Request  $request  请求对象，需包含 room_id
+     * @return JsonResponse 操作结果
+     */
+    public function clearScreen(Request $request): JsonResponse
+    {
+        $request->validate([
+            'room_id' => 'required|integer',
+        ]);
+
+        $admin = Auth::user();
+        $roomId = $request->input('room_id');
+        $superLevel = (int) Sysparam::getValue('superlevel', '100');
+
+        // 需要站长权限才能全员清屏
+        if ($admin->user_level < $superLevel) {
+            return response()->json(['status' => 'error', 'message' => '仅站长可执行全员清屏'], 403);
+        }
+
+        // 清除 Redis 中该房间的消息缓存
+        $this->chatState->clearMessages($roomId);
+
+        // 广播清屏事件
+        broadcast(new \App\Events\ScreenCleared($roomId, $admin->username));
+
+        return response()->json(['status' => 'success', 'message' => '已执行全员清屏']);
+    }
+
     /**
      * 权限检查：管理员是否可对目标用户执行指定操作
      *
diff --git a/app/Services/ChatStateService.php b/app/Services/ChatStateService.php
index d963bd2..edb08a1 100644
--- a/app/Services/ChatStateService.php
+++ b/app/Services/ChatStateService.php
@@ -104,6 +104,17 @@ class ChatStateService
         Redis::ltrim($key, -$maxKeep, -1);
     }
 
+    /**
+     * 清除指定房间的所有消息缓存（管理员全员清屏）。
+     *
+     * @param  int  $roomId  房间ID
+     */
+    public function clearMessages(int $roomId): void
+    {
+        $key = "room:{$roomId}:messages";
+        Redis::del($key);
+    }
+
     /**
      * 获取指定房间的新发言记录。
      * 在高频长轮询或前端断线重连拉取时使用。
diff --git a/resources/js/chat.js b/resources/js/chat.js
index 07da39c..a75170c 100644
--- a/resources/js/chat.js
+++ b/resources/js/chat.js
@@ -56,6 +56,13 @@ export function initChat(roomId) {
             window.dispatchEvent(
                 new CustomEvent("chat:title-updated", { detail: e }),
             );
+        })
+        // 监听管理员全员清屏
+        .listen("ScreenCleared", (e) => {
+            console.log("全员清屏:", e);
+            window.dispatchEvent(
+                new CustomEvent("chat:screen-cleared", { detail: e }),
+            );
         });
 }
 
diff --git a/resources/views/chat/partials/input-bar.blade.php b/resources/views/chat/partials/input-bar.blade.php
index 9d115f9..057b8a6 100644
--- a/resources/views/chat/partials/input-bar.blade.php
+++ b/resources/views/chat/partials/input-bar.blade.php
@@ -95,6 +95,9 @@
                 <button type="button" onclick="promptAnnounceMessage()"
                     style="font-size: 11px; padding: 1px 6px; background: #7c3aed; color: #fff; border: none; border-radius: 2px; cursor: pointer;">📢
                     公屏</button>
+                <button type="button" onclick="adminClearScreen()"
+                    style="font-size: 11px; padding: 1px 6px; background: #dc2626; color: #fff; border: none; border-radius: 2px; cursor: pointer;">🧹
+                    清屏</button>
             @endif
 
             <button type="button" onclick="location.reload()"
diff --git a/resources/views/chat/partials/scripts.blade.php b/resources/views/chat/partials/scripts.blade.php
index 238d72f..11f41aa 100644
--- a/resources/views/chat/partials/scripts.blade.php
+++ b/resources/views/chat/partials/scripts.blade.php
@@ -400,15 +400,37 @@
         delete onlineUsers[user.username];
         renderUserList();
 
+        // 原版风格：趣味离开语（与进入一致的风格）
+        const gender = user.sex == 2 ? '美女' : '帅哥';
+        const uname = user.username;
+        const leaveTemplates = [
+            `${gender}<b>${uname}</b>潇洒地挥了挥手，骑着小毛驴哼着小调离去了`,
+            `${gender}<b>${uname}</b>开着跑车扬长而去，留下一路烟尘`,
+            `${gender}<b>${uname}</b>踩着七彩祥云飘然远去，消失在天际`,
+            `${gender}<b>${uname}</b>悄无声息地溜走了，连个招呼都不打`,
+            `${gender}<b>${uname}</b>跳上直升机螺旋桨呼呼作响，朝大家喊道："我先走啦！"`,
+            `${gender}<b>${uname}</b>拱手告别："各位大虾，后会有期！"随后翩然离去`,
+            `${gender}<b>${uname}</b>骑着自行车铃铛叮当响，远远就喊："下次再聊！拜拜！"`,
+            `${gender}<b>${uname}</b>坐着热气球缓缓升空，朝大家挥手告别`,
+            `${gender}<b>${uname}</b>迈着六亲不认的步伐离开了，留下一众人目瞪口呆`,
+            `${gender}<b>${uname}</b>化作一缕青烟消散在空气中……`,
+        ];
+        const msg = leaveTemplates[Math.floor(Math.random() * leaveTemplates.length)];
+        const now = new Date();
+        const timeStr = now.getHours().toString().padStart(2, '0') + ':' +
+            now.getMinutes().toString().padStart(2, '0') + ':' +
+            now.getSeconds().toString().padStart(2, '0');
+
         const sysDiv = document.createElement('div');
-        sysDiv.className = 'msg-line sys-msg';
-        // VIP 用户离开也带专属颜色
+        sysDiv.className = 'msg-line';
+        // VIP 用户离开也带专属颜色和图标
         if (user.vip_icon && user.vip_name) {
             const vipColor = user.vip_color || '#f59e0b';
             sysDiv.innerHTML =
-                `<span style="color: ${vipColor}">☆ ${user.vip_icon}${user.vip_name} ${user.username} 潇洒离去 ☆</span>`;
+                `<span style="color: ${vipColor}; font-weight: bold;">【${user.vip_icon} ${user.vip_name}】${msg}</span><span class="msg-time">(${timeStr})</span>`;
         } else {
-            sysDiv.innerHTML = `<span style="color: gray">☆ ${user.username} 离开了聊天室 ☆</span>`;
+            sysDiv.innerHTML =
+                `<span style="color: #cc6600">【离开】${msg}</span><span class="msg-time">(${timeStr})</span>`;
         }
         container.appendChild(sysDiv);
         scrollToBottom();
@@ -475,6 +497,41 @@
         document.getElementById('room-title-display').innerText = e.detail.title;
     });
 
+    // ── 管理员全员清屏事件 ───────────────────────
+    window.addEventListener('chat:screen-cleared', (e) => {
+        const operator = e.detail.operator;
+
+        // 清除公聊窗口（say1）所有消息
+        const say1 = document.getElementById('say');
+        if (say1) say1.innerHTML = '';
+
+        // 清除包厢窗口（say2）中非悄悄话的消息
+        const say2 = document.getElementById('say2');
+        if (say2) {
+            const items = say2.querySelectorAll('.msg-line');
+            items.forEach(item => {
+                // 保留悄悄话消息（含 msg-secret 类）
+                if (!item.querySelector('.msg-secret')) {
+                    item.remove();
+                }
+            });
+        }
+
+        // 显示清屏提示
+        const sysDiv = document.createElement('div');
+        sysDiv.className = 'msg-line';
+        const now = new Date();
+        const timeStr = now.getHours().toString().padStart(2, '0') + ':' +
+            now.getMinutes().toString().padStart(2, '0') + ':' +
+            now.getSeconds().toString().padStart(2, '0');
+        sysDiv.innerHTML =
+            `<span style="color: #dc2626; font-weight: bold;">🧹 管理员 <b>${operator}</b> 已执行全员清屏</span><span class="msg-time">(${timeStr})</span>`;
+        if (say1) {
+            say1.appendChild(sysDiv);
+            say1.scrollTop = say1.scrollHeight;
+        }
+    });
+
     // ── 发送消息（Enter 发送） ───────────────────────
     document.getElementById('content').addEventListener('keydown', function(e) {
         if (e.key === 'Enter' && !e.shiftKey) {
@@ -670,6 +727,32 @@
         }
     }
 
+    // ── 管理员全员清屏 ─────────────────────────────────────
+    async function adminClearScreen() {
+        if (!confirm('确定要清除所有人的聊天记录吗？（悄悄话将保留）')) return;
+
+        try {
+            const res = await fetch('/command/clear-screen', {
+                method: 'POST',
+                headers: {
+                    'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute(
+                        'content'),
+                    'Content-Type': 'application/json',
+                    'Accept': 'application/json'
+                },
+                body: JSON.stringify({
+                    room_id: window.chatContext.roomId,
+                })
+            });
+            const data = await res.json();
+            if (!res.ok || data.status !== 'success') {
+                alert(data.message || '清屏失败');
+            }
+        } catch (e) {
+            alert('清屏失败：' + e.message);
+        }
+    }
+
     // ── 滚屏开关 ─────────────────────────────────────
     function toggleAutoScroll() {
         autoScroll = !autoScroll;
diff --git a/routes/web.php b/routes/web.php
index 59c0720..b0d4618 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -93,6 +93,7 @@ Route::middleware(['chat.auth'])->group(function () {
     Route::post('/command/freeze', [AdminCommandController::class, 'freeze'])->name('command.freeze');
     Route::get('/command/whispers/{username}', [AdminCommandController::class, 'viewWhispers'])->name('command.whispers');
     Route::post('/command/announce', [AdminCommandController::class, 'announce'])->name('command.announce');
+    Route::post('/command/clear-screen', [AdminCommandController::class, 'clearScreen'])->name('command.clear_screen');
 });
 
 // 强力特权层中间件：同时验证 chat.auth 登录态 和 chat.level:super 特权（superlevel 由 sysparam 配置）