Now some medium-strength aluminum alloys have been replaced by rare earth high-strength magnesium alloys,Get application on fighter planes. With the development of magnesium alloy preparation technology, the material properties such as strength, specific stiffness, heat resistance and corrosion resistance are further improved, so that the scope of application is further expanded. At present, the main application areas include various civil and military aircraft engine parts, propellers, gearboxes, support structures, and some parts of rockets, missiles and satellites. The temperature resistance of the half-fold is improved, and the various engine boxes, transmission boxes and power supply devices of the aircraft will gradually be made of magnesium alloy.