In　general　methods,　the　measured　frequency　response　functions　(FRFs)　are　usually　directly　used　to　identify　the　characteristics　of　bolted　joints.　However,　the　system＇s　ill-posed　problems　may　arise　due　to　measurement　error　and　noise　effect,　and　the　measurement　at　mechanical　joints　may　be　obstructed　by　joining　mechanisms.　A　new　identification　method　with　FRFs　was　developed　to　avoid　the　ill-posed　problem.　A　finite　element　model　of　the　whole　structure　composed　of　substructures　and　bolted　joints　was　established　and　the　ranges　of　equivalent　stiffness　and　equivalent　damping　were　obtained　in　accordance　with　the　relationship　between　the　parameters　of　bolted　joints　and　the　normalized　frequency.　The　averages　of　the　value　ranges　of　equivalent　stiffness　and　equivalent　damping　were　used　as　the　initial　value　of　the　bolted　joints　model,　and　the　minimal　FRFs　calculation　error　between　experiment　and　simulation　results　was　taken　as　the　objective.　Finally,　the　equivalent　stiffness　and　equivalent　damping　of　bolted　joints　were　thus　obtained.　By　comparison　of　the　results　of　the　simulation,　the　experiment　and　other　literatures,　it　is　shown　that　the　proposed　method　can　significantly　improve　the　accuracy　of　identification.