Abstract: In order to improve the efficiency of railway software application delivery and the level of application security management, this paper designed and implemented a railway application delivery platform based on DevSecOps, elaborated on the architecture of the platform, as well as the security delivery technology based on DevSecOps and the integration technology of cloud native safe ecology tool, and implemented functions such as application management, application deployment management, data analysis, and platform management. Practice has shown that the application of this platform has improved the efficiency of railway application research and development, reduced security threats to applications, and provided technical support for railway digital transformation.