Continuously variable crown (CVC) working roll contour and control method thereof

The invention discloses a continuously variable crown (CVC) working roll contour and a control method thereof, and belongs to the technical field of steel rolling. The curvilinear equation of the contour is: R (x)=b6*6+b5*5+b4*4+b3*3+b2*2+b1x+b0, wherein R(x) represents the radius difference between the roll bodies of working rolls and the unit of the different is mm; x represents the axial coordinate of the roll bodies, the origin of coordinates is at one end of the roll and the unit is mm; and b0 to b6 represent coefficients of a polynomial equation. By the method, the conflict that the CVC four-roll rolling mill working roll of a wide steel strip hot continuous rolling unit or a finish rolling unit is required to have both wide convexity regulating range and lower contour roll diameter difference is eliminated, so that the quality of the strip profile is improved.