Abstract: Through analysis of experiment results，the primary and secondary relationships of the type，dosage，adsorption mode，temperature and adsorption time of clay with the chroma and turbidity of lubricating oil prepared by clay adsorption were obtained. The dosage and type of clay were the main influence factors of the chroma and turbidity of the lubricating oil. Based on the orthogonal tests，the influence of the operation parameters on the quality of the lubricating oil was studied through single factor experiment. All these studies form a test basis for the industrial production of the clay adsorption process.