Convenient disassembly and assembly guide wheel device

The invention particularly provides a convenient and fast guide wheel dismounting and mounting device which comprises a supporting plate, a guide wheel, a guide wheel, a guide wheel and a guide wheel, a cross-shaped empty groove is formed in the center of the supporting plate, one end of the empty groove is communicated with the end face of the supporting plate, and a sliding channel used for dismounting a long guide wheel shaft is arranged below the open groove; the guide wheel shaft, the three short guide wheel shafts with fixed positions and the detachable long guide wheel shaft are mounted in the mounting groove of the lower support plate and are arranged in a quadrangle shape; the guide wheel is sleeved on the guide wheel shaft; the ball head locking pin vertically penetrates through the supporting plate, has an unlocking function and is used for controlling the long guide wheel to horizontally slide on the channel; and the fixed steel rope is welded between the ball head locking pin and the support plat