Abstract: In order to further improve the network security awareness and attack and defense skills of railway workers, this paper used Docker Swarm cluster and dynamic independent target technology to design a network security shooting range. The shooting range was characterized by rapid deployment, rapid recovery and easy expansion. It can be used for daily network security learning, competition and simulation environment penetration testing, and has been put into use in China Railway Lanzhou Group Co. Ltd. The application results show that the shooting range has played an important role in training network security talents in railway stations and depots and improving the level of "civil air defense" of railway network security.