Established　the　vertical　ground　source　heat　exchanger＇s　finite　length　cylindrical　surface　heat　and　moisture　transfer　model　based　on　the　mass　and　energy　conservation　theory.　Simulated　the　non-steady-state　heat　and　moisture　transfer　of　soil　around　the　ground　source　heat　exchanger　with　COMSOL　multi-physics　coupling　analysis　software,　and　analyzed　the　influence　in　temperature　and　moisture　field　outside　the　borehole　caused　by　the　heat　and　moisture　transfer　in　different　soil　thermal　properties　and　initial　moisture　contents　conditions.