According to the manufacturing process, it can be divided into casting pulley, welding pulley, double plate pressing pulley, forging pulley and rolling pulley forging pulley. It is a processing method that uses forging machinery to exert pressure on the metal billet of pulley to produce plastic deformation to obtain forgings with performance, shape and size. It is one of the two major components of forging (forging and stamping). The microstructure is optimized through the defects of as cast looseness in the smelting process of forging energy metal. At the same time, the mechanical properties of forgings are generally the same as those of castings made of the same material due to the preservation of complete metal flow lines. In the related machinery, the important one with high load and severe working conditions is usually forged except for the simple shape of rolled plates, sections or weldments. Compared with the cast pulley, the forged pulley has its structure and mechanical properties after forging. The deformed pulley after hot working makes the raw material crystallize, and changes the original crystal and columnar crystal into the crystal structure with fine grain and uniform size, which makes the structure in the pulley tighter. The physical properties of the pulley, the appearance surface and coarseness of the processed pulley forging The roughness is more beautiful and smooth than the casting pulley, because the process cost accounting is more expensive than the casting pulley. However, for the important high-quality, large cranes or other models, pulley forgings are more often selected.