There is still a gap between domestic AND foreign LED packaging materials in research and application. Although products of high refractive packaging materials have entered the market, they cannot be applied in LED devices with high quality requirements due to problems in reliability. The market of high-end packaging materials is basically monopolized by the products of large foreign companies. Compared with foreign products, the materials developed or produced in China have some disadvantages such as low luminous flux, poor adhesion and high water absorption. Because several big foreign enterprises control of key raw materials, domestic sales of glue to keep itself in market monopoly, domestic enterprises need to solve the problem of independent synthetic raw materials, break the monopoly of foreign companies for raw materials and control, and on the production equipment and technology independent innovation, prevent foreign enterprises patent trap. With the promotion of the market and the investment of a large number of enterprise funds, technical problems will continue to be solved by research and development personnel, domestic LED packaging materials will catch up with imported packaging materials.