Abstract: Railway construction technology in China is becoming more and more advanced, and the Building Information Modeling (BIM)technology has achieved phased results in the field of railway construction. BIM technology has promoted the exploration and transformation of China's railway from the traditional construction system to the intelligent construction mode in the new era. Based on the analysis of the development background of intelligent construction at home and abroad, this paper put forward the connotation and characteristics of intelligent construction of railway engineering, combined with engineering practice to form seven technical support systems for railway intelligent construction, organically integrated information technology and construction technology. The paper introduced the application practice of engineering design and simulation, factory processing, precision measurement and control, automatic installation, dynamic monitoring and information management, put forward the development direction of BIM technology in the process of intelligent railway construction. It also provided a reference for deepening the application of BIM technology, promoting the lean, intelligent, efficient and green coordinated development of railway construction process, and further improving the railway construction technology and the level of railway construction.