For finish rolling of common straightcarbon steel with wide strip alloy steel stainless steel,copper and aluminum strips. With middle roll device. It is not necessary to grind the arc to control the strip shape. Equipped with bent-roll device for large quantity rolling and reduce the end cracking of the strip. It consists of decoiling equipment, 3-high leveling machine, main frame, processing platform, hydraulic draw-work, trolley, strip screw down device and electric control.