diff --git a/data-center-business-controller/src/main/resources/db/migration/V105__alarm_duration.sql b/data-center-business-controller/src/main/resources/db/migration/V105__alarm_duration.sql
new file mode 100644
index 0000000..60410de
--- /dev/null
+++ b/data-center-business-controller/src/main/resources/db/migration/V105__alarm_duration.sql
@@ -0,0 +1 @@
+ALTER TABLE alert_history ADD `alarm_duration` bigint DEFAULT null COMMENT '告警持续时间，单位毫秒';
\ No newline at end of file