diff --git a/migrations/000120_add_polling_card_status.down.sql b/migrations/000120_add_polling_card_status.down.sql
new file mode 100644
index 0000000..03e4e49
--- /dev/null
+++ b/migrations/000120_add_polling_card_status.down.sql
@@ -0,0 +1,5 @@
+ALTER TABLE tb_polling_config
+    DROP COLUMN IF EXISTS card_status_check_interval;
+
+ALTER TABLE tb_iot_card
+    DROP COLUMN IF EXISTS last_card_status_check_at;
diff --git a/migrations/000120_add_polling_card_status.up.sql b/migrations/000120_add_polling_card_status.up.sql
new file mode 100644
index 0000000..a52e724
--- /dev/null
+++ b/migrations/000120_add_polling_card_status.up.sql
@@ -0,0 +1,13 @@
+-- 新增卡状态轮询相关列
+-- tb_polling_config 新增 card_status_check_interval：配置卡状态检查间隔（秒），NULL 表示不启用
+-- tb_iot_card 新增 last_card_status_check_at：记录最后一次卡状态检查时间，与其他 last_*_check_at 字段保持一致
+
+ALTER TABLE tb_polling_config
+    ADD COLUMN IF NOT EXISTS card_status_check_interval INT NULL;
+
+COMMENT ON COLUMN tb_polling_config.card_status_check_interval IS '卡状态检查间隔（秒），NULL 表示不启用卡状态轮询';
+
+ALTER TABLE tb_iot_card
+    ADD COLUMN IF NOT EXISTS last_card_status_check_at TIMESTAMPTZ NULL;
+
+COMMENT ON COLUMN tb_iot_card.last_card_status_check_at IS '最后一次卡状态检查时间';