On　the　basis　of　the　reciprocating　low-cycle　pseudo-static　test　on　pile-soil　interaction　of　prestress　high　concrete　(PHC),　the　regularities　of　distribution　as　well　as　calculating　methods　of　pile-soil　pressure　and　lateral　displacement　were　investigated.　The　calculating　methods　of　displacement-based　pile-soil　interaction　under　the　shear　equilibrium　were　presented　and　compared　with　the　traditional　M　method　and　p-y　curve　method,　etc.　The　results　show　that　there　exists　a　large　error　in　the　results　of　lateral　displacement　of　embedded　pile　calculated　by　the　strain　transform　method,　M　method　and　p-y　curve　method.　The　pile-soil　pressure　along　the　pile　depth　increases　at　first　and　then　decreases.　Meanwhile,　pile-soil　pressure　reverses　under　the　certain　depth.　With　the　increase　of　displacement　load,　the　pressure　of　shallower　soil　dramatically　increases,　nearly　reaching　up　to　passive　earth　pressure.　However,　the　deeper　soil　slightly　increases　with　the　increase　of　displacement　load.　The　internal　force　and　the　lateral　displacement　calculated　by　M　method　demonstrate　the　linear　correlation.　Unfortunately,　the　M　method　overestimates　the　capacity　of　piles　and　lowers　the　safety　in　the　seismic　design　and　calculation.　The　internal　force　and　lateral　displacement　calculated　by　p-y　curve　method　tend　not　to　show　the　significant　damage　or　descent　trajectory.　The　p-y　curve　method　overestimates　the　ductility　of　pile-soil　system　and　lowers　the　safety　in　the　seismic　design　and　calculation.　Furthermore,　the　values　calculated　by　dint　of　p-y　curve　method　are　different　from　experimental　results.　The　displacement-based　interaction　of　pile-soil　simplified　calculating　method　is　applicable　to　the　calculation　of　internal　forces,　lateral　displacement　and　pile-soil　pressure.　The　proposed　method　provides　a　reference　for　the　relevant　specification.　©　2018,　Editorial　Department　of　China　Journal　of　Highway　and　Transport.　All　right　reserved.