A　field　test　is　carried　out　to　study　the　effect　of　vibration　while　treating　foundation　using　vibroflotation　method　in　the　deep　soil　layer　in　Zhengzhou,　China.　The　vibration　attenuation　rules　and　wave　propagation　rules　in　different　formations　caused　by　different　numbers　of　drills　are　analyzed.　Evaluate　the　influence　on　the　adjacent　buildings.　The　result　shows　that　the　vibration　will　be　generated　in　foundation　obviously　in　the　process　of　construction　using　the　method.　Vibration　force,　impact　frequency　and　site　soil　are　important　influence　factors　on　ground　vibration　attenuation.　The　analysis　reveals　that　the　maximum　vertical　acceleration　attenuation　velocity　was　much　greater　in　near　area　than　that　in　the　relative　far　area.　The　waves　caused　by　vibration　propagate　in　two　ways:　(1)　surface　wave　is　generated　on　the　wall　of　drill　hole　and　propagated　to　the　ground　surface,　and　attenuated　in　a　certain　distance　(＜8m);　(2)　shear　wave　was　generated　and　propagated　in　the　impacting　formation　and　attenuated　from　the　deep　formation　to　the　ground　surface.　Vibration　amplitude　is　mainly　distributed　in　the　low　frequency　range　in　the　areas　which　far　away　from　vibration　source　and　in　the　silt　layer　near　the　ground　surface.