Magnesium alloy is light weight, good heat dissipation performance, thermal conductivity is 100 times than PP, anti-electromagnetic interference, good electromagnetic shielding and other characteristics have been widely used in the automotive industry and electronic device. Since 2014, magnesium alloy has been more and more used for seats of European high-speed rail. In the automobile industry, it is also showing an increasing trend. The current consumption of 1% is expected to be 10% in 5 years.