Cedar has undertaken all kinds of carbon fiber composites parts for rail transportation (subway vehicles, urban rail vehicles, high-speed trains and maglev trains). Cedar has developed and applied the flame retardant resin system (EN45545) for rail transportation, and formed the advanced technology system of material selection - design (structure and function) - simulation - process - manufacture for carbon fiber composites parts for rail transportation. The database of carbon fiber composites applied to rail transportation components has been established, as well as the design, analysis and calculation methods. The technology of integrated structural and functional molding and preparation of carbon fiber composites for rail transportation has been formed. The domestic design, research and development and production application of carbon fiber composites for rail transportation from non-load bearing, sub-load bearing to main load bearing components have been realized, laying the foundation for the mass application of carbon fiber composites in rail transportation components.