Abstract: To avoid passenger flow backlog on train platform caused by train delay, especially during peak hours, to accurately grasp the passenger flow distribution over time, the influencing factors of passenger waiting area selection under train delay condition are analyzed, and a passenger waiting area selection model based on utility function is established. An incremental allocation algorithm is designed to deduce the evolution pattern of platform passenger flow distribution under train delay condition through simulation. Shendu Highway Station of Shanghai Metro Line 8 is taken as simulation verification example, results show that the model and algorithm can accurately assist the station to formulate platform passenger flow guidance strategies and management measures, and to determine the timing of emergency response activation.