Abstract: The MIP process for maximizing iso-paraffins developed by Research Institute of Petroleum Processing，SINOPEC is a proprietary technology to produce clean gasoline component. The FCC-Ⅲ unit with 1.40 Mt/a in Jilin Petrochemical Corporation was revamped for MIP operation, and put into running smoothly since Nov.6,2010. The industrial results show that the adopted MIP process, in comparison with the previous conventional FCC process, the product slate with lower yields of dry gas and slurry, and a higher yield of total liquid products are obtained. The product gasoline is characterized by lower contents of olefin and sulfur. The RON of the gasoline is 93.0. The cetane number of the diesel product reaches 24. The total liquid yield (LPG+Gasoline+Diesel) is 81.15%.