Since 1987, the amount of composite materials used in the aerospace field has doubled every five years, and new composite materials have appeared every year. Advantages of composite materials: light weight and high strength, customized layup design according to product performance requirements, high damage tolerance to reduce damage caused by accidents, effective reduction of composite fatigue/corrosion problems, good heat resistance, product deformation is not obvious when temperature changes , Automatic layering, simple assembly of components with complex structure