The plate rolling machine is a four-roll plate rolling machine, which is used to bend and roll metal plates of a certain thickness into tubular, curved or certain taper parts at normal temperature. Its working principle is rotary bending deformation. Because the side rollers on both sides can be tilted up and down, and the lower rollers can be lifted and lowered, there is no need to add additional equipment such as presses, and the pre-bending and forming bending functions of both ends of the plate can be completed without turning, and the correction of the formed workpiece can be used. With the help of the auxiliary device, the end of the plate can be aligned, and the remaining straight edge is less. It is an essential equipment for machinery and equipment manufacturing industries such as petroleum, chemical, cement, shipbuilding, boiler, aviation, water conservancy, and wind tower.