Abstract: With the deepening of the new round of informatization application of railway engineering construction with BIM technology as the core, the importance of standard innovation research on IFD coding as a component is becoming increasingly prominent. This paper is based on the Railway BIM Alliance standard and has been validated and supplemented with IFD coding through implementation layer coding verification and innovative research. Combined with Dynamo's rapid modeling technology, attribute batch assignment technology, model lightweighting technology, and platform information collection and sharing technology, the original isolated project information and multi business system information islands have been broken, achieving horizontal management and collaboration of multiple systems during the construction phase at the project level. Finally, it was validated in projects such as the Nanjiang River Railway, Jingxiong Railway, Changyi Changsha Railway, and Tianjin Rail Transit Z4 Line, creating considerable application benefits.