Abstract: There are three main problems in using BIM model as data source for two-dimensional railway bridge longitudinal profile drawing: (1) how to unfold BIM model along alignment with mileage as horizontal axis including horizontal curve zone; (2) How to obtain terrain data from 3D services for drawing; (3) How to efficiently extract geometric and non-geometric information required for drawing from geological BIM models. To solve the above problems, based on the BIMBase domestic 3D graphics platform, this paper first uses instance attribute interpretation technology to extract main structure information of bridge, then develops railway engineering terrain and geology data service systems respectively, dynamically connects to remote service interfaces to extract the terrain and geological information, finally calls AutoCAD/API functions to develop bridge longitudinal profile drawing software, and completes application in Guangzhou Zhanjiang High speed Railway project. Research methods and development ideas in this paper can provide reference for other industrial software localization alternatives and BIM technology R & D projects.