Effect　of　vibration　was　tested　to　treat　foundation　using　vbroflotation　method　on　cam　ented　layer　in　Zheng-　zhou　The　vibration　attenuation　rules　and　the　wave　propagation　rules　in　different　formations　caused　by　different　numbers　of　drills　were　analyzed　to　evaluate　the　influence　on　the　adjacent　buildings　The　results　show　that　the　vibration　willbe　generated　in　foundation　obviously　in　the　process　of　construction　using　vibroflotation　method　And　tie　rate　of　vibration　attenuation　was　higher　on　ground　surface　and　in　the　inner　formation　The　waves　caused　by　vibration　propagated　in　two　ways　(　1)　surface　wave　was　generated　on　thewall　of　drill　hole　and　propagated　to　the　ground　sur-　face　and　attenuated　in　a　certain　distance　(　＜　8m).　(　2)　shear　wave　was　generated　and　propagated　in　the　cemented　formation　and　attenuated　from　the　deep　formation　to　the　ground　surface　Vibration　amplitude　is　mainly　distributed　in　the　low　frequency　range　in　the　area　faraway　from　the　vibration　source　and　in　the　silt　layer　near　the　ground　surface.