Use nanotechnology to improve and enhance the basic properties of coatings. Based on the structure of nano-SiO2, Ke Bo et al. explained the principle of nano-SiO2 improving the performance of coatings and believed that the thixotropy, pigment suspension and aging resistance of nano-SiO2 coatings were significantly improved. Xu Guocai used nano-SiO2 with an average particle size of 30nm in UV-curing coatings to improve the curing speed, hardness, adhesion and thermal stability of the coating at low temperatures. Jia Zhiqian et al. from Beijing University of Chemical Technology modified nano-CaCO~ with fatty acid salt and resin acid salt, and then filled polyester polyurethane varnish with modified nano-CaCO3 and unmodified nano-CaCCh, and found that the dilute suspension of nano-CaCO~ coating basically behaved as follows: Newtonian fluid properties, when the solid volume fraction is greater than 4, the viscosity curve deviates from the Einstein viscosity equation. The modified nano-CaCO~ has obvious thixotropic properties. The polyurethane varnish filled with it is superior to the varnish filled with unmodified nano-CaCO~ in flexibility, hardness, leveling and gloss. Zhejiang University proposed a method for in-situ surface nano-modification preparation of nano-coatings, and prepared high-performance nano-coatings with significant nano-modification effects. The exterior wall latex paint modified by nanomaterials developed by the Chinese Academy of Sciences and Zhejiang University has strong aging resistance, good stain resistance, strong washability, and strong UV resistance and color retention. A coating composed of TiC nanocrystals and SiC has a hardness of more than 25GPa and can reduce the friction coefficient to less than 0.2 on different surfaces.