Bolted　joints　often　have　a　significant　effect　on　the　dynamical　behavior　of　assembled　mechanical　structures　and　the　analytical　prediction　of　structural　responses,　which　depends　on　the　accuracy　of　bolted　joints　modeling.　A　novel　method　to　identify　the　bolted　joint　parameters　is　proposed.　Firstly,　the　tangential　models　of　bolted　joints　are　established　with　boundary　conditions　and　compatibility　conditions　using　the　Timoshenko　beam　theory,　this　model　consider　the　moment　of　inertia　of　the　tip　mass.　Secondly,　the　second　natural　frequency　and　damping　ratio　of　Timoshenko　beam　are　obtained　from　the　modal　testing,　which　are　adopted　to　identify　the　tangential　stiffness　and　damping　of　the　bolted　joints　based　on　the　Cramer＇s　rule　in　the　different　preloads,　the　identification　parameters　is　coupled　by　finite　element　method,　and　the　dynamic　properties　of　assembled　structure　are　obtained.　Finally,　the　error　between　the　theoretical　and　experimental　results　of　the　natural　frequencies　is　less　than　1.05%.　These　results　indicate　that　the　present　analysis　is　accurate,　and　more　straightforward　than　the　other　analysis　methods.