The　in-situ　tests　on　lateral　monotonic　loading　are　performed　for　offshore　large　diameter　pipe　piles　which　diameter　is　2　m　based　on　Xiangshui　offshore　wind　farm.　Monopile　model　is　established　by　ANSYS,　comparative　analysis　between　the　test　results　and　API　curve,　[m]　method　and　[m]　correction　method　of　code　for　pile　foundation　of　harbor　engineering　are　carried　out　basing　the　soil　parameters　from　designer.　It　is　shown　that　the　results　of　API　[p-y]　curve　method　is　conservative,　the　results　of　m　method　and　[m]　correction　method　are　non　conservative,　but　the　results　of　m　correction　method　is　agreed　with　the　tests.　More　tests　data　and　computational　analysis　are　needed　for　the　comparative　study　of　the　above　methods　needs　©　2019,　Editorial　Board　of　Acta　Energiae　Solaris　Sinica.　All　right　reserved.