Rubber support fixing device

The utility model relates to the technical field of mechanical part testing, in particular to a rubber support fixing device which comprises an upper pressing plate, a lower pressing plate and a buckling plate, and the upper pressing plate and the lower pressing plate jointly clamp a rubber support. A plurality of adjusting sliding grooves which are arranged at intervals are correspondingly formed in the upper pressing plate and the lower pressing plate on the periphery of the rubber support, sliding fixing parts and adjusting fixing parts are assembled in the adjusting sliding grooves in a sliding mode, supporting rods are in threaded connection with the adjusting fixing parts, and the supporting rods make contact with the buckling and pressing plate in a supporting mode; the sliding fixing pieces are in stopping and anti-falling fit with the corresponding upper pressing plate or lower pressing plate in the vertical direction; the buckling and pressing plates correspond to the adjusting sliding grooves in a