Abstract: The train-centric autonomous train control system achieves autonomous operation control through inter-train communication and vehicle-wayside communication. The characteristics of the train-centric autonomous train control system are analyzed from aspects of system architecture, function allocation and scenario analysis. Seven functions such as train positioning, information sharing, resource management, interval control, autonomous route arrangement and mobile authorization, train status monitoring and speed control, as well as three working scenarios including normal operation, degraded operation, emergency operation are emphatically introduced.