Abstract: Catalytic cracking is one of the most active and distinctive refining and processing technologies in China. With a 60 years development history, it has accumulated a large amount of process and engineering technology and experience, playing a crucial role in converting heavy oil into light products, automotive fuel production, gasoline quality upgrading, and improving the economic benefits of refining enterprises. By reviewing the development trend of catalytic cracking technology and looking forward to the future development needs of the refining industry, catalytic crackingis expected to continue to provide strong support in the process of refining structure adjustment and oil chemical transformation in the future.In the future, catalytic cracking technology will focus on making new efforts in short process reengineering of refineries, direct crackingof crude oil, flexible adjustment of oil and chemical product structure, energy conservation and emission reduction, and clean production.

Key words: atalytic cracking, RTC, gasoline, propylene, octane number