The organosilicon polymer has a Si—O bond as the main chain, and an organic group is connected to a silicon atom, and may have R3 SiO1 / 2 (M), R3 SiO2 / 2 (D), R3 SiO3 / 2 (T), R3 SiO2 ( Q) Combination of equal chain links according to a certain ratio; Si—O bond has high energy, which makes it have better high temperature resistance or radiation performance, and Si—O bond has a larger bond angle, which can make the molecular chain of the material soft . Organic silicon materials have excellent properties in terms of heat resistance and resistance to yellowing. Organic silicon materials are easy to modify, and functional groups that can increase the refractive index, such as sulfur, benzene, phenol, and epoxy groups, can be introduced into the side chain to increase the refractive index of the packaging material and the LED luminous efficiency.