【Objective】To promote the informationisation and intelligence of railway engineering operation and maintenance, and to improve the efficiency of maintenance. 【Method】 Based on the secondary development of Revit and Unity3D platform, a railway track engineering operation and maintenance intelligent information platform is developed. The platform adopts a three-layer structure of data layer, application layer and interface layer, integrates three modules of human-computer interaction, operation and maintenance information management and technical information access, and can realize functions such as AR scanning, BIM model roaming display, animation simulation of complex facilities disassembling and assembling operation, drawing of track geometric waveform, calculation of TQI, access to maintenance records, querying of technical regulations and CAD drawings, etc., which is of high utility, high portability, and strong operability. It has the features of high practicality, good portability and strong operability. 【Result】 The platform performs well in the field application test of public works, and all functions can run stably, which achieves the expected purpose of research and development. 【Conclusion】 The construction and development of the platform provides a new way of thinking to promote the informatisation and intelligentisation of railway engineering operation and maintenance.