In recent years, with the growth of mobile and portable demand, consumers have higher and higher requirements for product appearance quality. As well as the promotion of new technologies such as 5G and the Internet of Things, thinning, fashion, and intelligence have become important trends in the development of consumer electronics. And how to take into account performance and design while satisfying the thin and light design, In addition to further improvements in structural design, the application of composite materials is also very important.