Abstract: Aiming at the problems including data silos, inconsistent standards, and difficulties in cross professional correlation analysis existing in railway multi professional information systems, this paper studied and designed an interface scheme for the railway multi professional digital resource sharing platform. The scheme proposed unified basic data governance, flexible business data acquisition, and an authorization based sharing service mechanism. It adopted a flexible mode of “platform defined standards, original code retention in systems, and interface enabled translation” to resolve data semantic ambiguity and standard adaptation of business systems. By means of “data type coding” indexing and the mode of “offline application plus online authorization”, it realized accurate data positioning and secure data sharing. Application results show that the scheme reduces interface maintenance costs, supports cross professional data analysis and auxiliary decision making, and provides a reusable technical paradigm for data assetization management in the railway industry.