All passenger roads are blocked. Nanning subway station is defined as the passenger flow that arrives in a certain period of time exceeds the passenger flow that normal passenger transport facilities or passenger transport organization measures can bear. Usually, large passenger flow mainly occurs at the end of some important holidays or large-scale cultural and sports activities. Compared with the normal passenger flow, the crowded large passenger flow leads to the slow movement of passengers and the slow flow of the whole station, which makes all passenger flow roads in the station blocked and seriously affects the travel of pedestrians and passengers. In addition, the occurrence of large passenger flow will also increase the pressure on the operation of the station, which will pose a serious threat to the operation safety of the station, and once the stampede incident occurs carelessly, it will also be a safety hazard to pedestrians and passengers.