The scrap metal baler can squeeze a variety of relatively large metal scraps, scrap steel, scrap iron, scrap copper, scrap aluminum, disintegrated car shells, waste oil barrels, etc. into qualified furnace materials of various shapes such as cuboid, cylinder, and octagon . It is convenient for storage, transportation, and recycling. After being pressed into a block, the loss is extremely low when put into the furnace for recycling. The whole production process does not require heating, adding additives or other processes, and is directly formed by cold pressing, which also ensures that the original material remains unchanged. For example, cast iron scraps can be used instead of cast pig iron after forming. For castings of special materials, recycling is of greater significance.