Basing　on　the　cylindrical　heat　transfer　model　of　vertical　ground　source　heat　exchanger,　and　according　to　the　mass　conservation　and　energy　conservation　theorem,　established　a　finite　length　cylindrical　heat　and　moisture　transfer　model　for　soil　layer　around　the　borehole.　Simulated　the　non-steady-state　heat　and　moisture　transfer　of　soil　layers　around　the　heat　exchanger　under　summer　operating　conditions　by　using　COMSOL　multi-physics　coupling　analysis　software,　and　analyzed　the　influence　of　different　soil　thermal　properties　and　initial　moisture　contents　in　temperature　field　and　moisture　field　of　soil　layers　exerted　by　the　heat　and　moisture　transfer.　©　2012　IEEE.