A　new　approach　was　proposed　to　remove　sulfuric　compounds　from　fluid　catalytic　cracking　(FCC)　gasoline　by　combining　an　alkylation　desulfurization　catalytic　distillation　(ADCD)　column　with　a　hydrodesulfurization　catalytic　distillation　(HDS-CD)　column.　In　the　ADCD　column,　isobutylene　(IB)　and　3-methylthiophene　(3MT)　were　designated　as　the　model　compounds　for　olefin　and　sulfide,　respectively;　NKC-9　cation　exchange　resin　was　used　as　the　catalyst.　In　the　BIDS-CD　column,　dibenzothiophene　(DBT)　was　chosen　as　the　model　sulfides;　Nickel　phosphide　supported　on　the　TiO2-Al2O3　composite　oxide　prepared　by　our　laboratory　were　designated　as　the　HDS　catalyst.　Simulations　for　these　two　CD　columns　were　carried　out　by　RADFRAC　module　of　Aspen　Plus.　The　optimization　results　revealed　that　the　ADCD　column　had　an　alkylation　selectivity　of　96%,　and　the　sulfur　content　in　the　overhead　stream　was　less　than　8　mu　g/g.　The　simulation　results　of　the　HDS-CD　process　showed　that　the　sulfide　in　the　bottom　stream　of　ADCD　column　can　be　removed　practically　by　100%　and　the　clean　oil　stream　from　the　bottom　of　HDS-CD　column　has　hardly　any　sulfur.