In　order　to　study　the　behavior　and　working　properties　of　piles-cushion-soil　interaction　of　rammed　soil-cement　pile　composite　foundation,　field　loading　tests　of　single　pile　and　composite　foundation　with　single　pile,　four　piles,　nine　piles　in　different　lengths　and　area　displacement　ratio　have　been　carried　out.　Distribution　of　the　soil　contact　pressure,　the　shaft　resistance　of　pile　have　been　measured　by　installing　special　measuring　gauges.　Based　on　the　test　results,　the　failure　pattern,　the　behavior　of　piles-cushion-soil　interaction　were　analyzed.　Distribution　of　the　soil　contact　pressure,　the　stress　ratio　and　the　load　ratio　of　pile　to　soil,　distribution　of　the　shaft　resistance　in　single　pile　and　pile　of　composite　foundation　have　been　analyzed.