With the development of the information technology, the security of information system becomes more and more important in enterprise management. In this paper, a new backup platform based on asynchronous data cloud is proposed to connect application system with logical data cloud and physical data cloud and they can back up the system data stably and efficiently. And in order to optimize the backup resources, different strategies were applied to different objects in the platform. Implement in backup system of China Tobacco Zhejiang Industrial CO.LTD shows that the platform is suit to regional and large enterprise which has great deal of data.