Abstract: With the heavier and poorer quality of crude oil, and increasingly stringent requirements of environmental protection laws and regulations for energy saving and emission reduction, the energy production enterprises are actively seeking ways to further improve the utilization rate of crude oil, reduce the yield of black products to improve the yield of light oil, increase the production of high efficiency products, and improve the economic benefits. According to its actual situation, Lanzhou Petrochemical Company puts forward the "Three Guarantees" gasoline production optimization process, namely "overall optimization of catalytic cracking, gasoline etherification and alkylation, ensuring the benefit maximization". The combined process provides a new way for the improvement of economic benefit in the process of gasoline upgrading. It has great applicability and good model significance, and shows broad application prospect.