Identity authentication and access control system and method for 5G-R terminal

The invention discloses an identity authentication and access control system and method for a 5G-R terminal, which realize unified and centralized authentication of the identity of the whole-path 5G-R terminal and realize more targeted access control on a railway application service system accessed by a mobile terminal. Unified identity authentication of the 5G-R terminal before the 5G-R terminal accesses a railway application service system is realized through an interaction process of a security access program (client/plug-in) of the 5G-R terminal and an initial connection management and identity authentication module; a management bureau connection management and access control module is inserted between the 5G-R terminal and the railway application service system to realize access control from the 5G-R terminal to the railway application service system. According to the method, the risks that illegal terminals falsely use legal users to access the railway internal application service system and attack the