The invention discloses a multilayer buffer spring which comprises an inner spring, a middle spring and an outer spring. The middle spring is mounted inside the outer spring, the inner spring is mounted inside the middle spring, a fixing rod is mounted inside the inner spring, the height of the middle spring is twice that of the outer spring, the height of the inner spring is three times that of the outer spring, the diameter of the inner spring is smaller than that of the middle spring, the diameter of the middle spring is smaller than that of the outer spring, the bottoms of the inner spring, the middle spring and the outer spring are positioned on the same horizontal plane, and the centers of the fixing rod, the inner spring, the middle spring and the outer spring are positioned on the same straight line. The multilayer buffer spring is simple in structure and has high economic benefits and wide application prospects, the free height and stiffness coefficient can be adjusted, a fastening component applies pressure to one peripheral side of the outer spring to increase friction force between a cavity and the inner spring, and positional fixity of the inner spring and the outer spring is ensured.