The invention discloses a method for preparing an UV (ultraviolet)-curable high-temperature-resistant and corrosion-resistant organic silicon/silica hybrid coating. In the method, tetraethoxysilane is taken as an inorganic phase precursor, methyltriethoxysilane and diphenyldimethoxysilane are taken as organic phase precursors, then the mixed liquor of gamma-methacryloxy silane and a free-radical photo-initiator is added, and an UV-curable organic silicon/silica hybrid sol can be prepared by using a sol-gel method; and after a base material is coated, the base material is cured by ultraviolet light for 30-300s so as to obtain an organic silicon/silica hybrid coating, thereby forming hybrid gel space network structure taking Si-O-Si bonds as a skeleton. The method disclosed by the invention has the following technical effects: the hybrid coating subjected to ultraviolet-light curing forms a denser network structure, thereby facilitating the improvement of comprehensive properties, and especially facilitating the improvement of corrosion resistance; and the denser network structure can form a physical 'barrier' better so as to prevent corrosive substances such as water and chemical reagents and the like from contacting a substrate.