Abstract: In response to the problem of traditional guidance signage systems in urban rail transit affecting the spatial decoration effect in large-span and spacious stations, as well as the difficulty in displaying real-time vehicle marshalling information in flexible marshalling operation modes, this paper designed an urban rail guidance signage system for large-span and spacious stations and flexible marshalling operation modes. The system adopted a two-level network architecture of "line level and station level", based on key technologies such as digital media integrated broadcasting and editing, bracket type signage carrier display, and audio-visual integration communication, implemented flexible editing and multi-dimensional communication of diversified information under various flexible marshalling operation scenarios and signage display requirements. The trial results in the Beijing Metro Daxing Airport Line North Extension Project show that the system can meet the passenger guidance information service needs of large-span and spacious stations and flexible marshalling operation modes, provides reference for the construction of urban rail guidance signage systems.