Hub fixing device for automobile maintenance

The utility model discloses a hub fixing device for automobile maintenance. Top plate, the lower end of the top plate is fixedly connected with a supporting plate. A bottom plate is arranged on the lower side of the supporting plate; a lifting pipe is fixedly connected to the bottom plate; one end of the lifting pipe is fixedly connected with a hub lower pressing plate; a second switch is arrangedon the side wall of the outer side of the lifting pipe; a hydraulic rod is arranged at the bottom of the lifting pipe; sliding grooves are formed in the side walls of the two sides of the lifting pipe. A sliding block is connected into the sliding groove in a sliding manner; a sliding plate is fixedly connected between the two sliding blocks; the side wall of one side of the sliding plate is fixedly connected with the hydraulic rod, a first switch is arranged on the side wall of one side of the sliding plate, a connecting plate is arranged on the upper side of the sliding plate, the connecting plate and the sliding p