The utility model relates to the field of supporting devices for automobile maintenance, and discloses a supporting device for automobile maintenance, which comprises a supporting frame, a supporting mechanism arranged at the top of the supporting frame, a fixing mechanism arranged at the top of the supporting frame, and universal wheels arranged at the bottom of the supporting frame. The supporting mechanism comprises a hydraulic rod, a positioning plate, a supporting plate and a supporting rod, the bottom of the hydraulic rod is fixedly connected with the supporting frame, the output end of the hydraulic rod is fixedly connected with the positioning rod, the top of the supporting rod is fixedly connected with the supporting plate, and the bottom of the supporting rod is fixedly connected with the positioning plate. By arranging the supporting mechanism, after the automobile parts are fixed, the output end of the hydraulic rod drives the positioning plate to move, the positioning plate moves to drive the supporting rod to move, and the supporting plate also moves along with the supporting rod, so that the automobile parts can be kept at a certain height from the ground, and maintenance of the automobile parts is facilitated.