The utility model relates to a hydraulic roll bending device, which is suitable for a rolling mill with four or six rolls of roll shift to control the shape of the plates.

The nonlinear relationship between roll crown of CVC rolls and their shift amount is first deduced. The concept of crown limit is first given in the paper.

With axial shift of intermediate roll, the bending of work roll on HC mill can be effectively controlled and the controllability of profile increases.