Abstract: Much concern has been paid on the human-induced vibration of large-span structures in recent years. The characteristics of pedestrian loads under a variety of probable activities in railway station structures are analyzed. Based on the proper forms of activities when passengers are walking, waiting or checking in the waiting room, the dynamic forces of the single person under a specific form of activities are tested, including normal walking, standing up from seat, standing up from squatting position, jumping down from one meter high platform. Analytical expressions for the characteristics of pedestrian loads for the above four cases are presented through statistical analysis. The results show that: 1) The measured dynamic load factors (DLFs) of a walking footfall force are less than the values suggested by foreign scholars, namely the widely accepted equations of DLFs based on the statistical gait results of Europeans are somewhat conservative. 2) The amplitude of a vertical dynamic load induced by single person stand up from seat can be twice the static weight, which may cause excessive vibration of large-span structures, especially when a dense crowd stand up from seat simultaneously. The results of the present study are expected to be useful for the future study of characteristics of pedestrian loads and the mechanism of structural vibration induced by crowd loads.