Metal Straightening Machine, call as manual leveling machine is through the leveling machine multiple groups of roller roller type leveling, so as to achieve the leveling effect. Ordinary Metal Straightening Machine is used a supporting roll is installed between the lower leveling work roll and the supporting bearing (wheel) to form a roll structure with two upper and lower weights and a total of four weights; Flattening roll force distribution, good structural rigidity, work roll deflection deformation is small, high accuracy, stroke harmonic attenuation straightening, from the fundamental solution of ordinary leveling common leveling, easy to produce roller impression, workpiece Angle collapse, sickle bending and other problems, improve the accuracy of plate correction, a wide range of application.