diff --git a/database/migrations/2026_02_27_003842_seed_leaderboard_limit_sysparam.php b/database/migrations/2026_02_27_003842_seed_leaderboard_limit_sysparam.php
new file mode 100644
index 0000000..4473105
--- /dev/null
+++ b/database/migrations/2026_02_27_003842_seed_leaderboard_limit_sysparam.php
@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * 文件功能：向 sysparam 表插入排行榜显示人数配置项
+ *
+ * 新增 leaderboard_limit 参数，后台可动态配置排行榜每个榜单显示人数。
+ *
+ * @author ChatRoom Laravel
+ *
+ * @version 1.0.0
+ */
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * 插入排行榜显示人数配置记录
+     */
+    public function up(): void
+    {
+        // 避免重复插入
+        $exists = DB::table('sysparam')->where('alias', 'leaderboard_limit')->exists();
+
+        if (! $exists) {
+            DB::table('sysparam')->insert([
+                'alias' => 'leaderboard_limit',
+                'body' => '20',
+                'guidetxt' => '🏆 排行榜每榜显示人数',
+            ]);
+        }
+    }
+
+    /**
+     * 回滚：删除配置记录
+     */
+    public function down(): void
+    {
+        DB::table('sysparam')->where('alias', 'leaderboard_limit')->delete();
+    }
+};