In　order　to　develop　high　performance　composite　membranes　for　alcohol　permselective　pervaporation　(PV),　poly　(dimethylsiloxane)/ZIF-8　(PDMS/ZIF-8)　coated　polymeric　hollow　fiber　membranes　were　studied　in　this　research.　First,　PDMS　was　used　for　the　active　layer,　and　Torlon　(R),　PVDF,　Ultem　(R),　and　Matrimid　(R)　with　different　porosity　were　used　as　support　layer　for　fabrication　of　hollow　fiber　composite　membranes.　The　performance　of　the　membranes　varied　with　different　hollow　fiber　substrates　was　investigated.　Pure　gas　permeance　of　the　hollow　fiber　was　tested　to　investigate　the　pore　size　of　all　fibers.　The　effect　of　support　layer　on　the　mass　transfer　in　hydrophobic　PV　composite　membrane　was　investigated.　The　results　show　that　proper　porosity　and　pore　diameter　of　the　support　are　demanded　to　minimize　the　Knudsen　effect.　Based　on　the　result,　ZIP-8　was　introduced　to　prepare　more　selective　separation　layer,　in　order　to　improve　the　PV　performance.　The　PDMS/ZIF-8/Torlon　(R)　membrane　had　a　separation　factor　of　8.9　and　a　total　flux　of　847　g.m(-2).h(-1).　This　hollow　fiber　PDMS/ZIF-8/Torlon　(R)　composite　membrane　has　a　great　potential　in　the　industrial　application.　(C)　2019　The　Chemical　Industry　and　Engineering　Society　of　China,　and　Chemical　Industry　Press　Co.,　Ltd.　All　rights　reserved.