Ball linear guide rail with dustproof effect

The ball linear guide rail with the dustproof effect comprises a sliding block, first mounting plates are fixed to the two ends of one side of the sliding block respectively, second mounting plates are fixed to the bottoms of the two first mounting plates respectively, small motors are fixed to the tops of the two second mounting plates respectively, the two small motors are symmetrically arranged, and the two small motors are symmetrically arranged. Output shafts of the two small motors rotationally penetrate through the first mounting plate, two symmetrically-distributed connecting shafts are fixed to the outer walls of the cambered surfaces of the ends, away from the small motors, of the output shafts of the two small motors, connecting plates are rotationally arranged on the two connecting shafts, and limiting plates are fixed to the sides, close to each other, of the two connecting plates; arc-shaped plates are fixed to the sides, close to each other, of the two limiting plates. The dismounting difficult