Abstract: Objective: Conventional CBTC (communicationbased train control) systems are no longer able to fully meet the needs of largescale urban rail transit line network construction and operation. Therefore, it is urgent to conduct indepth research on the ECCBTC (CBTC based on cloudedge collaboration) system, which integrates the latest cloud computing, IoT (Internet of Things), and safety electronic system technologies. Method: The architecture of the ECCBTC system is proposed, and the advantages of the ECCBTC system over conventional CBTC systems are analyzed. The specific design schemes and measures for the three key technologies of the ECCBTC system: realtime safety cluster, safety edge controller, low latency and high deterministic communication network are discussed.Result & Conclusion: The ECCBTC system is constructed based on ′bare metal′ secure computer cluster architecture, a 2oo2 (two out of two) safety cloud platform architecture and a 2oo3 (two out of three) safety cloud platform architecture. Compared with the conventional CBTC system, ECCBTC has the advantages of higher availability, better maintainability and safety, lower operation, maintenance and reconstruction costs, and support for largescale line network interoperation, making it a viable option for the signaling system under future urban rail transit largescale line networking operation conditions.