Dustproof rigid guide rail

The utility model discloses a dustproof rigid guide rail which comprises a guide rail base, symmetrical guide rail brackets, guide rail grooves, two rows and at least one pair of retainers, slide blocks and two steel shafts, wherein the guide rail brackets are arranged above the guide rail base and are integrally molded; the guide rail grooves are symmetrically formed in the inner sides of the guide rail brackets; the retainers are symmetrically arranged; the slide blocks are matched with the retainers and are arranged above the guide rail brackets; the two steel shafts are positioned in the guide rail grooves; the retainers are positioned inside the guide rail brackets and are opposite to the guide rail grooves; one sides, which are close to the guide rail grooves, of the retainers are effectively contacted with the steel shafts; the dustproof rigid guide rail also comprises a dustproof shield; matching devices matched with the dustproof shield are symmetrically arranged on the outer sides of the guide rail brackets; the dustproof shield is matched with the guide rail brackets through the matching devices and is fastened to the upper side of the guide rail; a bolt is arranged on each retainer; at least two rows and two pairs of clearance adjustment through holes are symmetrically formed in the slide block; and the bolts can penetrate through the clearance adjustment through holes to be connected with the slide blocks. The guide rail is dustproof, high in rigidity and applicable to different machine stands.