In order to set the green time of pedestrian crossing reasonably，ensure the safety of pedestrians and improve their crossing efficiency，the modeling of the pedestrian platoon crossing time is performed by means of the mathematical statistics method． By analyzing pedestrians' behavior characteristics at a signalized crosswalk，the pedestrian platoon crossing time is divided into the basic crossing time and the frictional delay． Then，based on the interference characteristic of bidirectional pedestrians，the relationship between the directional split ratio and the actual capacity of the crosswalk during the encounter phase of bidirectional pedestrians is investigated． On this basis，a pedestrian platoon crossing time model is proposed，and a data survey is adopted to verify the effectiveness of this model． The results show that，in comparison with the actual survey data，the calculation results of the proposed model shows a maximum relative error of 13． 21% and an average relative error of 6． 26% ，which means that the proposed model has a higher accuracy than the model of the HCM method． Thus，the proposed model can provide guidance for the pedestrian signal timing design．