Abstract: Based on the gas-solid two-phase turbulent model and kinetic model of fluidized catalytic cracking(FCC) gasoline catalytic conversion, a reaction-flow coupled model was built to simulate the FCC gasoline conversion process in the riser and riser-bed reactor respectively.For the riser reactor, the simulation result showed that the mass fraction of olefin decreased from 35.1% to 18%(mass), and most of the olefin was converted to isoparaffin, which was useful to maintain the gasoline octane rating.With increasing reaction temperature, the cracking reaction was enhanced, and the LPG yield dramatically increased when the reaction temperature was above 450℃ at the expense of the gasoline yield.For the riser-bed reactor, the mass fraction of olefin could be reduced to a very low level, 5% olefin when the reaction temperature was 400℃, MHSV was 4, while the gasoline yield was about 80%(mass).