Abstract: In view of the increasingly complex network environment, the weak border security protection of the existing network security transmission platform, the defects of the platform interface function and the low efficiency of repeated development and deployment, this paper used Golang language, Socket encrypted transmission mode and identity authentication technology to develop a general proxy service for the network security transmission platform. The proxy service has the functions of forward and reverse transparent proxy passing through the network security transmission platform, identity authentication for internal/external network security protection, access control, behavior detection and security management. As a transmission bridge in the railway Internet and mobile App projects, the proxy service has been applied in many systems and achieved good results.