This article mainly from the rail transit passenger flow event production, transmission and prevention of the research in three aspects, first of all, through consulting and analyzing research scholar of rail transit passenger flow of events related research results, rail transport large passenger flow is given the quantitative judgment of the incident, the rail transit passenger flow events carried out reasonable classification and to explore its causes. Then, according to the improved SIR model, the scope of influence of large passenger flow events can be more accurately planned and grasped, so that more targeted measures can be taken to improve the service level.