Abstract: The principle, means of engineering, technical characteristics and advantages of high gravity technology were introduced. The reaction principle and technical characteristics of C₄ alkylation by sulfuric acid method were analyzed and expounded. The application of high gravity technology in the process of C₄ alkylation of concentrated sulfuric acid was introduced. The application of high gravity technology in the process of C₄ alkylation of concentrated sulfuric acid was strengthened due to the mixing effect of acid-hydrocarbon reaction system. Compared with stirred alkylation in laboratory, the mass fraction of C₈ component was increased by 27.9%, the mass fraction of C₉⁺ component was increased by 22.1%, and the RON value of the product was increased by 9.0 units. Compared with the industrialized concentrated H₂SO₄ alkylation process, the RON value of alkylated oil can be increased by 1.9-3.9 units. The application of high gravity technology in sulfuric acid alkylation is of great application value to improve the reaction effect, enhance the technical level and satisfy the domestic demand of oil quality upgrading.