Forming method of roller of cathode roller

According to the cathode roller forming method, a steel cylinder obtained through finish machining is used as a mother plate for edge rolling of a copper plate, the copper plate is tightly rolled on the outer circle of the steel cylinder, flexible pressing force is provided by a plurality of sets of pressing rollers through springs, and the copper plate is subjected to elasticoplastic deformation to be tightly attached to the surface of the outer circle of the steel cylinder. After the copper plate is rolled on the surface of the outer circle of the steel cylinder, on the basis that the copper plate is fixed to the outer circle of the steel cylinder, the gap is welded, tight compounding of the copper cylinder and the steel cylinder is achieved, the welding seam is heated, stress is reduced, and the stability of the size of the copper cylinder is improved. The method overcomes the defects that when a traditional copper-steel composite plate is rolled and welded into a copper-steel cylinder, the forming roundne