Abstract: Realizing data sharing of existing railway information systems and accelerating the development of data integration applications is an effective way for pushing forward China's railway informationization construction. To deal with a wide range of and diverse types of data sources of railway enterprise's existing data asset, a data sharing platform suitable for centralized storage and management of railway enterprise multi-source heterogeneous data is developed based on the distributed data warehouse Greenplum. The platform provides functions such as data directory management, data collection, data sharing, operation monitoring management, and data security protection, realizing automatic collection, processing, and centralized storage of railway multi-source heterogeneous data. The platform adopts a highly reliable and scalable architecture design and visualization technology, providing platform administrators with convenient and easy-to-use visualization configuration and operation management tools, and providing convenient, efficient, stable, reliable, safe and compliant data sharing services for railway enterprise application developers. It better meets the needs of railway enterprise data integration application development and also builds a solid foundation for railway enterprise big data applications. The platform started trial operation in China Railway Lanzhou Group Co. Ltd., establishing a complete data asset catalog of existing information systems. It has collected 76 types of business data and provided stable and efficient data sharing services for more than ten information systems.