There are many methods for leveling steel plates. According to the different sizes and thicknesses of steel plates, different leveling methods can be adopted. If the steel plate is very thin, you can knock it flat with a hammer; Hit the concave part of the steel plate with the round head of the round head hammer, and the concave part of the steel plate will be deformed due to the impact of the hammer, and the steel plate will be flattened. If the steel plate is thick, it can be flattened by a press. It can also be heated and leveled. For example, steel plate bulging can be heated by oxygen+acetylene. After the heated part is cooled, the steel plate will deform in the opposite direction.