In　order　to　obtain　a　more　accurate　boundary　condition　of　structure　in　dynamic　analysis　and　optimization　design,　the　joint　parameter　identification　is　one　of　the　key　technologs.　In　combination　with　engineering　practice,　the　method　based　on　frequency　response　function　(FRF)　to　identify　the　characteristic　parameters　of　the　joint　was　proposed.　Whether　the　complete　FRF　can　be　obtained　or　not　was　studied　and　the　corresponding　solving　strategy　was　presented.　The　method　avoids　the　matrix　inversion　directly,　and　transforms　contradictory　equation　to　equation　with　definite　solution　by　using　least-square　principle,　which　ensures　the　stability　of　numerical　calculation.　Considering　the　damping　information　is　inferior　to　stiffness　information　in　identification　process,　in　order　to　identify　the　damping　parameter　more　accurately,　a　successive　identification　method　was　further　proposed.　Example　analysis　confirms　that　the　method　is　of　high　identification　accuracy.