Nano-Si has extremely strong ultraviolet absorption and infrared reflection properties, which can improve the anti-aging performance of coatings. The surface of nano-SiO2 can be treated to make the surface of O2 nanoparticles hydrophilic and lipophilic. In the interior and exterior wall coatings of buildings, adding nano-SiO2 can significantly improve the can opening effect of the coating, the coating is not stratified, has thixotropy, anti-sagging, good construction performance, and greatly improved anti-fouling performance. It has excellent self-cleaning performance and adhesion, and scrub resistance. In vehicle and ship coatings, adding nano-SiO2 can improve the aging resistance, finish and strength of the coating. Nano-O2 is mixed with ultraviolet curing coatings to reduce the curing speed of the curing coating and significantly improve the hardness and adhesion of the coating film.