Abstract: A structure of an ultraviolet light polarization component and a manufacturing process thereof, where a multi-layer thin film structure set is plated on a transparent falt substrate, and the multi-layer structure setis composed of a low refractive index thin film layer stacked for N times and a high refractive index thin film layer. The violet light is polarized into two polarization lights through the ultraviolet light polarization component, in which the two violet lights have a polarization ratio of larger than 10, so that the technical efficacy of realization of a small volume optical component and a large incident angle of the ultraviolet light.