In　order　to　solve　the　seismic　problem　of　prefabricated　steel　structure,　three　kinds　of　modularized　prefabricated　steel　frame　connections　with　Z-shaped　cantilever　beam　splicing　were　presented.　The　connections　can　utilize　the　slipping　of　splicing　and　the　plastic　deformation　of　reduced　beam　section　to　achieve　good　ductility　performance.　The　seismic　design　requirements　of　the　three　different　connections　were　proposed　in　order　to　reduce　earthquake　damage　of　the　beam-column　joint　weld　seam.　Based　on　the　static　experimental　results　of　three　full-scale　specimens,　the　static　finite　element　analysis　was　carried　out.　The　moment-rotation　curves　and　the　failure　modes　of　the　connections　were　obtained,　and　the　results　were　compared　with　experimental　results.　The　change　rules　of　the　friction　between　contact　surfaces　and　the　bolt　tension　force　are　obtained.　The　initial　rotation　stiffness,　slipping　load　and　yield　load　of　the　connections　were　calculated　by　deriving　the　simplified　calculation　formula.　The　results　show　that　the　failure　modes　of　connections　under　static　loading　are　the　large　local　buckling　deformation　of　cantilever　beam　bottom　flange　or　reduced　beam　section.　The　connections　undergo　large　plastic　deformation　before　failure,　and　the　failure　mode　is　the　ductile　failure.　Three　specimens　have　good　ductility　and　plastic　rotation　capacity.　The　results　obtained　by　the　simplified　calculation　formula　of　the　connections　are　in　good　agreement　with　the　experimental　results.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.