The　dynamic　model　of　joint　interfaces　is　usually　characterized　with　a　number　of　linear　spring-damping　elements,　it　cannot　reflect　the　hysteresis　nonlinear　characteristics　of　joint　interfaces　with　stick-slip　and　separation-slap.　Here,　its　dynamic　beharior　was　equivalent　to　a　Bouc-Wen　model.　Then,　the　range　of　parameters　in　the　model　was　restricted　and　sensitivity　analysis　was　conducted　for　each　parameters.　Finally,　the　parameters　of　Bouc-Wen　model　were　identified　with　the　least　square　method　under　different　forces　cotrolled　and　displacements　cotrolled,　the　identified　results　under　the　forces　controlled　and　those　under　the　displacements　controlled　were　compared,　and　the　effects　of　different　noise　disturbances　on　the　identified　results　were　also　analyzed.　The　simulation　results　showed　that　the　better　identified　results　can　be　obtained　under　the　displacements　controlled,　and　under　the　noise　disturbance　with　a　signal　to　noise　ratio　of　less　than　5%,　its　effects　on　the　identified　accuracy　of　the　parmeters　of　Bouc-Wen　model　are　little.