The process of aluminum alloy die casting is highly popular for making parts in building and industrial fields, but its most common application is in automotive industry. Compared with other manufacturing processes, the die casting process has the advantages of high production efficiency, high dimensional accuracy, excellent mechanical properties, high material utilization rate and better economic benefits of mass production. In the automotive aluminum alloy parts, die-casting aluminum alloy and other casting aluminum alloy components account for about 80%, processing aluminum only accounts for about 20%, and the consumption of die casting parts accounts for about 70% of the total amount of casting products. Therefore, die casting aluminum alloy products account for 54% – 70% of the automotive aluminum. With the increasing production of aluminum alloy die casting, aluminum die casting is gradually applied to automobile parts industry.