The invention discloses an ultraviolet (UV) curing paint and a preparation method and application thereof. The preparation method comprises the following steps: weighting modified SiO2 sol to place in a container, adding water-soluble UV-cured resin, solvent and additive in turn, stirring for 10min, then adding photoinitiator, and stirring for 5min to obtain the UV curing paint, wherein the contents of the water-soluble UV-cured resin, the solvent, the additive and the photoinitiator are 10-60%, 7-33%, 0.1% and 2% respectively. The UV curing paint prepared by the method of the invention has the advantages of inorganic materials such as high hardness, high wear resistance, scratch resistance and good thermal stability and also has the advantages of organic materials such as adhesivity and relative flexibility; and the UV curing paint is suitable to be used as the protective coatings on the surfaces of all kinds of optical plastic products such as polyester which contains polycarbonate, polymethylmethacrylate, polyethylene terephthalate (PET) and the like. By adopting the UV curing paint of the invention, the defects of the existing UV curing paint in the aspects of hardness, wear resistance, scratch resistance and light transmittance, can be overcomed to a certain extent.