Slitting line composition: uncoiling, feeding device, slitting and collecting. The main function is longitudinal slit the material to some size, to make preparation for further process. The slitting line has the advantages of logical composition, easy operation, high-level automaticity, high efficiency and precision. It can work on all kinds of cold and hot roll plate, silicon steel plate, stainless steel plate, color steel plate, aluminum plate and other electroplated or colored plate. It is widely used on the steel processing industry for automaticity, farm vehicle, container, electronics and building material.