Abstract: USY zeolite, Beta zeolite and ZRP zeolite were used for testing the cracking performance of heavy Fischer-Tropsch synthesis oil in a bench-scale fixed-fluidized bed reactor, respectively, emphasizing on the yield and properties of the naphtha product. The results indicate that the highest yield of catalytic naphtha is obtained using the USY zeolite catalyst, the content of iso-paraffins in the catalytic naphtha is as high as 39.87%; the LPG yield of 52.44% and 50.92% are reached over Beta and ZRP zeolite catalysts, respectively with high concentration of propylene. The differences of reaction performance of heavy Fischer-Trosph synthesis oil on the three different zeolite catalysts can be attributed to their different reaction paths. The monomolecular reactions are taken place in a dominant position in the small pores of ZRP zeolite, while in the larger pores of USY zeolite a bimolecular reaction mechanism is operative. In the pores of Beta zeolite, the monomolecular reactions are mainly taken place and the bimolecular reactions can be also occurred in a certain extent, but more than that of ZRP zeolite and less than that of USY zeolite.