Leveling is the use of machine equipment to slightly bend or stretch the busbar parts to achieve the effect of relieving stress, making the parts flat, dimensional stable, and surface flat. During the leveling process, it is necessary to select appropriate leveling process and equipment according to the shape, material, thickness and other characteristics of the parts, and strictly control the leveling force and speed to avoid adverse effects on the parts. Only when properly leveled can the busbar parts ensure dimensional accuracy and surface quality after bending, thus meeting customer requirements.