Conveyor line convenient for adjusting height of pulley

The utility model relates to a conveyor line convenient for adjusting pulley height, which comprises a frame main body and a pulley mechanism, the frame main body is provided with two parallel longitudinal beams, and the longitudinal beams extend along the conveying direction of the conveyor line; the pulley mechanism is provided with a pulley and a bottom plate, is mounted at the upper part of the longitudinal beam and is used for providing rolling friction during mold conveying; a plurality of mounting holes matched with each other are formed in the bottom plate and the longitudinal beam, bolts are arranged in the mounting holes in a penetrating manner, screw rods of the bolts sequentially penetrate through the mounting holes of the bottom plate and the longitudinal beam downwards, and nuts are arranged outside the screw rods in a sleeving manner; wherein each bolt is sleeved with at least two nuts between the bottom plate and the longitudinal beam, and the side, away from the bottom plate, of the longitudi