The invention discloses a computer system for analyzing, calculating, simulating and reconstructing a vehicle-pedestrian collision accident, which is used for road traffic accident assessment of a public security traffic management department. Through the system, running speed and collision speed of an accident vehicle in the vehicle-pedestrian collision accident can be calculated according to basic data acquired by accident scene inspection, and two-dimensional track description and three-dimensional process reconstruction of the accident vehicle, and main calculating data table output and accident occurrence process brief text output of the vehicle-pedestrian collision accident are realized. Through the system, technological content of traffic accident identification and handling is effectively improved, so the analysis and assessment result of the system can be easily and highly accepted by the traffic management department, an accident inspection organization and accident parties;therefore, the system plays an important role in distinguishing responsibility, avoiding contradiction intensification, reducing social instability factor, enhancing harmonious development of social life and the like; meanwhile, the system can be widely popularized and applied and has obvious business commonness and social public benefit.