So　far,　the　load　transfer　mechanism　and　the　determination　method　of　bearing　capacity　of　pile　are　being　also　considered　as　one　of　the　most　difficult　problems　for　pile　foundation　design.　According　to　the　physic　mechanics　parameters　of　soil　and　the　static　load　experimental　results　of　piles,　and　based　on　the　nonlinear　elastic　theory,　the　pile　bearing　capacity　and　test　results　were　all　studied　herein.　The　research　results　confirmed　that　the　relation　curves　of　load　acted　on　the　pile　top　and　the　ratio　of　point　resistance　to　lateral　friction　of　pile　have　distinct　phase　characters.　The　result　agrees　well　with　that　of　static　load　test.　Those　relation　curves　can　be　used　to　determine　the　ultimate　bearing　capacity　conveniently　for　enlarged　pile.　Compared　with　the　past　used　determination　method　of　the　load　bearing　capacity　according　to　the　load-settlement　curves　from　static　load　tests,　this　new　method　has　distinct　advantages　of　more　safety.