diff --git a/lib/common.sh b/lib/common.sh
index eafdcd7..3bad4f7 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -272,7 +272,7 @@ backup_database() {
     remote "mkdir -p ${REMOTE_DIR}/backups"
     if remote "sudo docker exec ${DB_CONTAINER} pg_dump -Fc -U ${DB_USER} ${DB_NAME} > /tmp/backup_${ts}.dump && mv /tmp/backup_${ts}.dump '${bf}'" 2>&1; then
         log_info "数据库备份成功: ${DB_NAME}_${ts}.dump"
-        cleanup_old_db_backups
+        cleanup_old_db_backups 7
     else
         log_warn "数据库备份失败，继续部署"
     fi