To　study　the　anti-seismic　property　of　light　steel　frame　reinforce　middle　joints　when　the　column　web　buckling,　and　provide　a　reference　for　seismic　design　of　light　steel　structure.　Conduct　two　groups　of　experiment　on　light　steel　frame　joints＇　seismic　performance　under　low　cycle　loading,　and　using　nonlinear　finite　element　program　ABAQUS　simulates　the　joints＇　performance,　and　compares　the　result　with　the　test　result,　and　lays　a　foundation　for　future　numerical　simulation.　The　joint　strengthened　by　increasing　horizontal　and　vertical　stiffener　ABAQUS　finite　element　simulation　is　effective　in　the　whole　process　of　simulation　test　process.　Two　types　of　strengthened　joints　on　the　light　steel　frame　has　good　seismic　performance,　and　simulation　and　finite　element　simulation　analysis　has　good　effectiveness.