Hoisting device for plate roller machining

The utility model discloses a lifting device for processing a printing roller in the field of printing roller processing, the lifting device structurally comprises a lifting rotating head, an I-shaped rail, an electromagnetic adsorber and a limiting plate, the lifting rotating head comprises a lifting ring, a clamping screw, a clamping block, a connecting column, a rotating base, a fixed base, a fastening bolt and a semicircular cover plate, the lifting ring is mounted at the upper end of the connecting column, and the I-shaped rail is mounted at the lower end of the lifting ring; the connecting column is installed in a circular hole in the rotating base, the semicircular cover plate is installed on the upper surface of the rotating base, the clamping block is installed on the upper surface of the semicircular cover plate, the clamping screw is installed at the right end of the clamping block, the fastening bolt is installed on the upper surface of the semicircular cover plate, and the rotating base is fixedl