Based　on　the　shaking　table　test,　the　seismic　response　of　the　main　parameters　of　the　two　span　skew　bridge　was　gutted.　The　finite　element　model　of　the　test　model　was　established　by　the　finite　element　analysis　software　OpenSEES.　An　improved　model　of　single　beam　quality　distribution　was　proposed　by　employing　the　main　beam　model　analysis　and　the　support　model　analysis.　Three　direction　ground　motion　input　analysis　was　carried　out　to　improve　the　quality　distribution　model　of　the　single　beam,　and　the　seismic　response　of　the　structure　under　the　three　direction　ground　motion　input　was　obtained.　The　comparison　was　made　between　the　analytical　results　and　experimental　results.　The　results　show　that　the　improved　single　beam　quality　distribution　model　can　consider　the　torsion　effect　of　the　beam　and　can　greatly　improve　the　efficiency　of　the　calculation,　and　the　analysis　result　is　greatly　improved,　which　is　more　close　to　the　experimental　data.　©　2017,　Editorial　Department　of　Journal　of　Wuhan　University　of　Technology.　All　right　reserved.