To improve the use efficiency of hydrogenated coking gasoline and to use the hydrocarbon components properly, the AQ hydrogenated coking gasoline was separated into the raffinate oil rich in non-normal hydrocarbons and the desorption oil rich in normal paraffins through the fixed-bed adsorption process using 5A molecular sieves. The adsorption breakthrough curves of normal paraffins were investigated. In comparison to the hydrogenated coking gasoline, the aromatic potential content and the research octane number (RON) of the raffinate oil rose by 14% age points and 30 units, respectively. As a result, the raffinate oil is more suitable to be used as the feed of the catalytic reforming process or the blending component of high-octane gasoline. In similar conditions, the ethylene yield of the steam cracking process using the desorption oil as feedstocks increased 11% age points compared to the hydrogenated coking gasoline feed.