Abstract: An assumption is brought, that is, by using seat cushion to make effective restraint in front of occupants’ center of gravity, and adding seat cushion obliquity adjusting instrument to increase the angle between seat cushion and floor of car body before or during front collision, occupants’ injury can be reduced. Therefore, based on the correlation size of a certain car and performance parameter of driving region, MADYMO analysis software is used to establish the simulation model of automobile front collision, and which is verified by tests. After simulation analysis by using different seat cushion obliquity, the result indicates that when 25° tilting angle of seat cushion is used, head injury declines 21.4% , chest injury drops 16.6% , but hip trauma only increases 8.2% , and the leg wound is still low. That is to say, adding seat cushion obliquity adjusting instrument in Occupant Restraint System can effectively reduce occupants’ injury.

Key words: Automobile front collision, Cushion obliquity adjusting, Occupant restraint, Occupants’ injury, Seat