Abstract: This paper introduced the characters and commercial application of LOG-90 high octane catalyst for residue catalytic cracking. The commercial application of LOG-90 results show that compared with the blank results, under the conditions of same coke and gas yield the total liquid yield can increase by 0.11% and the research octane number increase by 1.57 units. The analysis results of gas chromatography show that LOG-90 catalyst can significantly increase aromatic content and the ratio of iso/normal alkanes which is the main reason for the increase of ON of FCCG. The gasoline octane number loss is also reduced after hydrogenation.