Abstract: In view of the problems such as untimely handling of safety and quality risk early warning in the process of railway construction, low efficiency of design change, work inspection and pricing approval, this paper adopted big data storage technology and cloud security technology, integrated the data of relevant modules of the railway engineering management platform, designed an intelligent railway BIM digitalized construction management system with progress management, task supervision, safety management, work inspection and pricing, change design and other functions, and realized the design and construction and various module data are interconnected and highly shared. This system has been applied in the Guangzhou-Shanwei high-speed railway project, which improves the construction management level and efficiency of the project, while ensures data security and promotes the digital process of project management.