Abstract: The waste residue produced in the production of cracking catalysts was analyzed by XRF, N₂ adsorption-desorption, IR, pyridine adsorption and other methods, and the treatment process of removing impurities from the waste residue was studied. The FCC catalysts were prepared by spray drying using the treated catalyst waste or/and kaolin as a support, the zeolite as the active component. The results showed that the optimal process for treating catalyst waste residue was as followed: the solution pH was 3.0, the stirring time was 20 min, NH₄Cl feeding mass ratio was 20%, reaction temperature was 60 ℃, washing medium was NH₄Cl, the order of washing and calcination was washing,calcination and washing again. Compared with the catalyst using kaolin as the supports, the catalyst with mass fraction 10%-20% waste residue in the optimum carrier had better heavy oil conversion ability, higher liquid yield, higher gasoline selectivity, higher content of isoolefin and lower content of olefin in gasoline composition under the conditions of a reaction temperature of 480 ℃, a mass ratio of catalyst to oil of 7.5, a mass space velocity of 4 h^-1，using Daqing VGO as feedstock.

Key words: waste residue, active support, catalytic cracking, catalyst