Abstract: Quinoline catalytic cracking was studied on a fixed-bed microactivity test unit by using toluene, cetane, and tetralin as solvent. Reaction temperature, catalyst to oil ratio, weight hourly space velocity and feedstock nitrogen content affected the nitrogen content of spent catalyst and the nitrogen distribution in products. Catalyst acidity and hydrogen donating abilities of hydrocarbon solvent had marked effect on quinoline cracking. The coke on spent catalyst can be divided into three types, hydrocarbons, adsorbed nitrogen compounds, and condensed nitrogen. The possible reaction pathway of quinoline catalytic cracking is put forward. Quinoline could adsorb on catalyst surface by physical or chemical adsorption, or be deposited as coke via dehydrogenation. Quinoline could be converted into alkylquinoline. Quinoline could be hydrogenated into tetrahydroquinoline, which would be cracked into pyridine, aniline and ammonia.