Hydraulic plate bending machine is to continuous bending of the sheet metal roller under the two rollers on the moulding machine is the central character position by hydraulic oil for hydraulic cylinder acting on the vertical movement of the piston, through the last stage of main reducer gear driving two lower roller gear engagement cooperation between rotary motion, for rolling sheet providing torque. Coiling machine standard flat plastic sheet metal by machine of three working rollers (two on the next roll, one roll), with upper roller lower roller under pressure and rotation to bend the metal plates after multi-pass consecutive, cause permanent plastic deformation of volume made the required cylinder, cone, or part of them.