Alcohol-permselective　pervaporation　is　a　breakthrough　technology　in　industrial　separation　applications.　A　highflux　pervaporation　membrane　is　demanded　in　cost　saving.　In　this　study,　an　ultrathin　metal-organic　framework　(MOF)　membrane　was　formed　on　a　porous　polymer　substrate　using　a　hydroxyl　salt　induced　in　situ　growth　method.　Then,　the　obtained　MOF　membrane　was　modified　through　a　sulfidation　strategy　to　enhance　the　transport　of　alcohol　molecules.　The　aperture　of　the　MOFs　was　enlarged　to　form　a　hollow　structure.　Subsequently,　polydimethylsiloxane　was　spin-coated　on　the　MOF　membrane　to　eliminate　the　grain　boundary　defects　and　improve　the　hydrophobicity,　without　increasing　the　thickness　of　the　MOF　layer.　Based　on　the　ultra-fast　transport　channels,　the　modified　MOF　membrane　exhibited　an　ultrahigh　flux　of　11.6　kg　m(-　2)　h(-1)　with　comparable　separation　factors　for　5　wt%　ethanol　aqueous　solution　at　60　degree　celsius.　The　diffusion　mechanism　of　alcohol　molecules　was　confirmed　by　the　molecular　dynamic　simulation.