This　review　summarizes　the　recent　research　progress　of　surface　modification　methods　for　the　preparation　of　metal-organic　framework(MOF)thin　films.　MOF,　featured　by　designable　structures,　tunable　pore　sizes　and　functions　and　so　on,　is　considered　as　attractive　membrane　material　for　gas　separation.　Forming　interfacial　interaction　between　the　MOF　crystals　and　substrates　is　the　key　to　fabricate　a　continuous　and　compact　MOF　film.　Surface　modifications　can　improve　the　physical/chemical　properties　of　the　substrates　and　enhance　the　interaction　force　between　MOF　crystals　and　substrates.　In　this　review,　three　main　surface　modification　methods　for　the　preparation　of　MOF　thin　films　are　highlighted,　including　organic　molecular　modification,　inorganic　compound　modification,　and　MOF　seed　modification.　Particularly,　the　modification　mechanisms　of　different　modification　methods　are　emphasized,　and　the　influences　of　the　modification　methods　on　the　preparation　and　gas　separation　performance　of　MOF　thin　films　are　analyzed.　Due　to　the　diversity　of　MOF　and　complexity　of　the　film　formation,　single　modification　can＇t　always　produce　dense　and　uniform　MOF　membrane.　Therefore,　we　propose　that　it　will　be　an　important　development　direction　for　the　preparation　of　MOF　films　to　combine　different　modification　methods　according　to　the　properties　of　the　MOF　and　the　substrate.　©　2017,　Chemical　Industry　Press.　All　right　reserved.