Slitting machine is to cut the strip into several required specifications. The base of strip is welded by section steel and steel plate. In order to facilitate processing, automatic feeding, especially high-speed automatic feeding punch, slits the coil and divides the coil into several coils of certain width to meet the processing requirements. It has the advantages of paper and film attaching, high machining precision, eliminating the application of raw materials, no scratch protection and so on.