diff --git a/database/migrations/20260402120000_game_user_tier_bigwin_ticket.php b/database/migrations/20260402120000_game_user_tier_bigwin_ticket.php
new file mode 100644
index 0000000..fd2a27a
--- /dev/null
+++ b/database/migrations/20260402120000_game_user_tier_bigwin_ticket.php
@@ -0,0 +1,39 @@
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+/**
+ * game_user：档位权重、中大奖权重、抽奖券数量（JSON 文本）
+ */
+class GameUserTierBigwinTicket extends AbstractMigration
+{
+    public function change(): void
+    {
+        if (!$this->hasTable('game_user')) {
+            return;
+        }
+        $table = $this->table('game_user');
+        if (!$table->hasColumn('tier_weight')) {
+            $table->addColumn('tier_weight', 'text', [
+                'null'    => true,
+                'default' => null,
+                'comment' => '档位权重 JSON，如 [{"T1":"5"},{"T2":"20"}]',
+            ]);
+        }
+        if (!$table->hasColumn('bigwin_weight')) {
+            $table->addColumn('bigwin_weight', 'text', [
+                'null'    => true,
+                'default' => null,
+                'comment' => '中大奖权重 JSON',
+            ]);
+        }
+        if (!$table->hasColumn('ticket_count')) {
+            $table->addColumn('ticket_count', 'text', [
+                'null'    => true,
+                'default' => null,
+                'comment' => '抽奖券 JSON，如 [{"ante":1,"count":1}]',
+            ]);
+        }
+        $table->update();
+    }
+}