The invention provides a nonlinear variable-rigidity compound rubber stopper method and a compound rubber stopper. According to the transverse limiting requirement of locomotive vehicles, by means ofthe compound stopper formed by combining a high polymer material top plate, provided with a protruding block, with an elastic rubber body, transverse limiting is provided for locomotives through deformation of the elastic rubber body under small deformation, and while the load is increased, rubber slowly makes contact with a tool on the top and changes in a nonlinear manner; rigidity can also change in a weak nonlinear manner; after large deformation, the protruding part on the high polymer material top plate makes contact with a tool on the lower portion, and the hard stopper function is achieved; and the protruding part of the top plate also makes contact with the rubber in the transverse direction, and a transverse limiting effect is also achieved. According to the nonlinear variable-rigidity compound rubber stopper method and the compound rubber stopper, variable-rigidity restriction is conducted on the transverse limiting of the locomotive vehicles through cooperation of the top plate protruding block and the elastic rubber body, a hard stopper which is adjustable in stopper early-stage rigidity and provides relative hardness through a method of embedding a high polymer material inside a product as the hard stopper in the later period is obtained, and the comprehensive performance of the stopper is improved.