The invention discloses a permanent magnet automobile damping system. The permanent magnet automobile damping system comprises an upper support plate (1), a piston rod (2), a coil control circuit 1 (3), a magnetic separation material (4), a permanent magnet (5), a coil 1 (6), a lower support plate (7), a cylinder body (8), an intermediate support block (9), a coil control circuit 2 (10), a coil 2(11), a damping spring (12), a wire harness 1 (13) and a wire harness 2 (14). According to the permanent magnet automobile damping system, the electromagnetic force of the damping system is adaptivelychanged according to the different speeds during automobile running, so that the damping effect of the whole damping system is changed, and the problem that the single spring stiffness of a conventional suspension frame of an automobile is fixed, and the damping performance on different road surfaces is unstable, so that the spring cannot adapt to different road surfaces is solved.