Backrest wheel for stereo garage

The utility model discloses a back wheel for stereo garage, including first roller and fixed cover, the first roller is movably installed on the inner side of fixed cover, and the number of first roller is two, the one side of fixed cover's inner surface close to first roller is spliced and installed with two sets of second roller, and the second roller is spliced and installed on the fixed cover's inner surface close to first roller. Two sets of limiting clamping seats are fixedly mounted on the other side, close to the first rolling wheels, of the inner surface of the fixing cover, and splicing clamping frames used for assembling the first rolling wheels are mounted on the outer surface of the side edge of the fixing cover side by side; a user can fix a splicing clamping frame and a fixing cover, so that rectangular notches of the splicing clamping frame and the fixing cover are aligned with each other, a second rolling wheel is inserted into the rectangular notches, the splicing clamping frame and a splici