The invention discloses a sliding wheel device and a push-pull door window provided with the sliding wheel device. The sliding wheel device comprises a sliding wheel shell, the sliding wheel shell comprises two opposite side walls and a bottom plate, the corresponding end portions of the two side walls are connected with the bottom plate correspondingly, the sliding wheel device is further provided with a reinforcing plate connecting the two side walls, a hollow rotating shaft is arranged between the two side walls in a suspended manner, a sliding wheel is arranged on the hollow rotating shaft, and the hollow rotating shaft can move on the side walls to adjust the position height of the hollow rotating shaft and the sliding wheel. The sliding wheel device is simple in structure and convenient and efficient to install, when the push-pull door window with the sliding wheel device needs to replace the sliding wheel, raising a door window leaf body is just needed, and then the sliding wheel device can be taken out for replacement.