A simulation model is established on basis of the existing demand forecast by utilizing the passenger simulation software of LEGION. The model is checked carefully on basis of the author's professional working experience and study results on several similar projects so that it can fully reflect the operation status of the station during the time under study. The passengers' activities in the peak hours are simulated so as to forecast the operation status of the station. The simulation is very helpful to the detailed design and optimization of the architectural scheme of the station.