Abstract: Taking the construction of information system in China Tobacco Zhejiang Industrial Limited Corporation as an example,a SOA-based unified information integration platform in cigarette industrial enterprise was constituted with SAP XI.The integration system forms a star-shape connection with SAP XI as a central Hub,which connects all the systems in need,simplifies the complexity in integration of various systems.SAP XI transforms the formats of all data coming from source systems to realize the communication integration among different systems.The service bus of SAP XI links different systems of STMA,provincial corporations and manufacturing departments and realizes the seamless integration among multiple business systems of different levels.The application of information integration platform ensures the flexible,orderly and controllable information communication among application systems in enterprise at architectural level and resolves the problems of information island,data quality and flow integration.