Automobile suspension damping device

The invention provides an automobile suspension damping device. The automobile suspension damping device comprises: a rack; a supporting assembly, wherein the supporting assembly comprises a damping rotating plate hinged to the side wall of the bottom end of the rack, and a spring damper with the cylinder bottom hinged to the side wall of the top end of the rack, wherein a piston rod at the output end of the spring damper is hinged to the side wall of the middle of the damping rotating plate; and a movable assembly, wherein the movable assembly comprises a movable part with one end hinged to the side wall of the top end of the rack and a movable block hinged to the end, away from the rack, of the movable part. According to the suspension damping device, a triangular stable structure is formed by the spring damper, the damping rotating plate and the rack, and it can be guaranteed that the hub responds in time when being stressed, therefore time delay caused by transmission is reduced, and the purpose of stably