Abstract: To meet the security protection requirements of the railway power supply information system, the security resource pool is applied to the security protection of the railway power supply information system. This paper introduced the current status of security protection for various subsystems of the railway power supply information system, studied the characteristics of security resource pools, elaborated on the architecture, functions, and key technologies of the security resource pool of the railway power supply information system, thus implemented dynamic allocation of security resources, which provided reference for the security resource scheduling decision-making of the railway power supply information system.