Based on literature review and accident investigation methods, this paper determines the characteristic parameters and quantification methods of collision severity of collisions between vehicles and electric two-wheelers. Using PC-Crash software to simulate and reproduce 100 cases of car and electric bicycle collision accidents.And extracting the human body injury index of the electric bicycle driver. After that the human injury index is in-depth data association with the collision speed difference, collision type and collision angle of the two vehicles. The results show that the collision speed is positively correlated with human injury, and the vehicle speed has a greater impact on human injury. The type of electric bicycle collision and the the collision position of the two vehicles have a significant impact on human injury. Keywords: human body injuries; pedestrian vehicle collison; accident reconstruction

CICTP