In　this　paper,　a　dynamics　model　based　on　the　surface　uneven　pressure　distribution　was　presented　for　the　bolted　joint　because　the　surface　contact　pressure　of　bolted　joint　is　uneven　distribution　due　to　the　influence　of　concentrated　force　of　multi-bolts.　The　contact　surface　of　bolted　joint　was　assumed　to　be　flat　in　macro-scale　and　the　pressure　distribution　can　be　obtained　by　the　FEM.　The　contact　surface　of　bolted　joint　was　rough　surface　in　micro-scale,　and　the　normal　and　tangential　stiffness　damping　model　based　on　the　surface　contact　pressure　was　presented　for　the　bolted　joint　using　fractal　contact　theory.　An　experimental　set-up　with　box　shape　specimen　was　designed　for　validating　the　presented　model.　The　natural　frequencies　and　frequency-response　function　can　be　obtained　by　modal　testing.　Compared　with　simulation　result,　the　presented　model　can　be　used　to　accurately　predict　the　dynamic　characteristic　of　bolted　joint.　©　2016,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.