The utility model relates to an automobile speed changing box accessory, in particular to a speed changing box support used for fixing engines. The product plays a key pole in damping of automobiles. The speed changing box support comprises a main spring, an auxiliary spring, a base, an arch part and a cantilever. The main spring is between the base and the cantilever, the auxiliary spring is between the cantilever and the arch part, and the arch part and the base are riveted for assembly, and the auxiliary spring is provided with an extension section at the edge of the arch part along the cantilever, wherein the auxiliary spring is a rubber body. With the auxiliary spring adopting new structural design, compared with the traditional speed changing box support, the speed changing box support has the benefit that an actual vehicle can well protect aluminum die castings in case of passing over pits and slamming the brakes on.