The invention discloses a preparation method and an application of all-inorganic perovskite quantum dot glass, and belongs to the technical field of optical glass preparation. The preparation method comprises the following steps: fully grinding high-purity B2O3, SiO2, ZnO, SrCO3, Cs2CO3, PbBr2, NaBr and Eu2O3 to obtain a raw material mixture; carrying out high-temperature melting on the raw material mixture in an air atmosphere at 1150-1250 DEG C for 8-20 min, pouring the melted raw material mixture onto a preheated copper plate, and performing cooling molding to obtain precursor glass; and sequentially carrying out high-temperature destressing treatment and high-temperature heat treatment on the precursor glass to obtain the full-inorganic perovskite CsPbBr3:Eu<3+> quantum dot glass. TheCsPbBr3:Eu<3+> quantum dot glass has very strong ultraviolet and blue light shielding capability, can completely block 400-475 nm blue light, allows the transmittance of 200-400 nm ultraviolet light to not exceed 5%, has a transmittance of the in a visible light wavelength range of above 90% due to uniform distribution of CsPbBr3 quantum dots on a glass substrate, and can be used for ultraviolet and blue light shielding.