Currently,　most　of　studies　on　the　mechanisms　of　driving　and　pulling　for　Benoto　pile　sleeve　are　focused　on　sleeve　driving　process.　Yet,　pulling　by　high-frequency　vibration　are　deficient.　Using　the　ALE　(Arbitrary　Lagrangian-Eulerian)　method,　the　finite　element-infinite　element　coupling　model　is　developed　to　explore　the　pulling　mechanism　and　influence　of　parameters　on　sleeve　pulling.　The　results　of　numerical　analysis　show　that　the　process　of　sleeve　pulling　by　high-frequency　vibration　can　be　divided　into　two　stages:　the　slow　and　the　fast　pulling　stages.　During　sleeve　pulling,　the　soil　displacements,　stresses,　void　ratio　and　excess　pore　water　pressure　all　mutate　near　the　sleeve　end,　and　the　change　is　more　significant　as　approaching　to　the　sleeve　center.　Therefore,　the　influence　of　soil　parameters　(including　soil　young＇s　modulus　and　soil-sleeve　friction　coefficient)　and　vibration　hammer　parameters　(such　as　vibration　frequency　and　vibration　force)　on　sleeve　pulling　are　investigated.　When　the　soil　is　soft　and　the　friction　of　the　sleeve-soil　is　strong,　the　change　of　soil　displacements　and　stresses　variety　are　obvious.　The　parameters　of　the　vibrating　hammer　only　have　influence　on　sleeve　pulling　speed　and　soil　particle　velocity,　and　hardly　have　any　effect　on　soil　displacements　and　stresses.　When　the　vibration　frequency　is　close　to　the　natural　frequency　of　soil　layers,　the　pulling　resistance　is　the　small.　The　larger　the　vibration　frequency　is,　the　smaller　the　influence　range　of　vibration.　©　2017,　Science　Press.　All　right　reserved.