Abstract: This paper introduces the characteristics and principles of the alkylation of FCC gasoline desulfurization, and summarizes the technology status of alkylation desulfurization and research situations of desulfurization catalysts both at home and abroad in recent years. Alkylation desulfurization technology has the advantages of high desulfurization efficiency, reducing olefin content of oil and low loss of octane number, low operation costs and low investment on equipments, which is suitable to make efforts to research on.