Abstract: China and its enterprises have paid unprecedented attention to network security, and cryptography is the core technology of network security and an important foundation for security and controllability. To promote the development of the railway commercial cryptography application system, this paper studied the current railway commercial cryptography application, analyzed the compliance countermeasures of the national commercial cryptography standard, proposed a management system, a technical system and a security system of railway commercial cryptography, which laid a foundation for further accelerating the construction of railway commercial cryptography.