The CNC four-roller hydraulic bending machine is equipped with a programmable Siemens CNC system, which can store the automatic rolling/ bending data of hundreds of different workpieces, realize one-key calling, one-key start, simple operation and high precision. The CNC four-roll plate rolling machine not only satisfies the automatic plate rolling process of circle, but also meets the automatic plate rolling process of various arc, square, triangle, oblate, ellipse and other workpieces, and the workpiece processing precision is high. Imported hydraulic system and electric control system are adopted, and the control circuit is controlled by PLC programmable controller to ensure smooth operation of the plate rolling machine, convenient operation and long service life.