Composite materials are composed of two or more kinds of materials with different properties. Through physical or chemical methods, these composite materials have new properties. The comprehensive properties of composite materials are better than those of raw materials, so as to meet different requirements. The history use of composite materials can be traced back to ancient times. Straw or wheat straw reinforced clay and reinforced concrete, which have been used for hundreds of years, are composed of two materials. In the mid-1960s, carbon fiber reinforced composites came into being, and they were used in aircraft structures in the early1970s. Compared with the traditional materials , composite materials have the characteristics of high specific strength and specific modulus, good fatigue resistance, designability, and the identity of materials and structures. The application of com posite materials in aircraft structure has been improved continuously. The amount of composite materials used in Airbus A350 is close to 40% of the total mass. The composite materials used in the wing and fuselage of Boeing 787 are more than50%.Only carbon fiber composites used on fuselage panel for Airbus A380 is more than 30 tons.