Abstract: A FCC catalyst prepared by post-processing technology using NaY molecular sieve as a raw material was characterized by XRD, BET, NH3 TPD, IR and SEM techniques. The results show that compared with a reference catalyst treated by conventional method, the catalyst post-processed has many sunken macroporous structure on the surface, a certain amount of rare earth ions from supercage migrates to sodalite cage, and more rare earth ions exists in the sodalite cage than in the reference catalyst. The post-treated catalyst has a larger surface area and pore volume, stronger acidity, higher heavy oil conversion rate, and micro reaction activity.