In　order　to　solve　the　problem　that　assembly　degree　of　traditional　structure　is　not　high,　a　prefabricated　steel　frame　joint　with　Z-shaped　cantilever　beam　splicing　was　presented.　Based　on　the　experimental　results　of　six　specimens,　the　static　and　quasi-static　finite　element　analysis　was　carried　out.　The　moment-rotation　curves　of　both　the　beam　end　and　the　splice,　and　the　failure　modes　of　the　joints　were　obtained,　and　the　results　were　compared　with　experimental　results.　The　change　rules　of　the　friction　between　contact　surfaces,　the　extrusion　force　between　bolt　shanks　and　holes,　and　the　bolt　tension　force　were　obtained.　The　effects　of　bolt　number,　bolt　hole　diameter,　types　of　stiffeners　and　types　of　framework　beams　on　the　seismic　behavior　of　the　joints　were　analyzed.　The　moment-rotation　relationship　model　of　the　splice　was　constructed　through　force　analysis　of　the　states　of　loading　process.　The　results　show　that　reducing　the　number　of　flange　high-strength　bolts　can　improve　ductility　performance　and　plastic　rotation　capacity　of　joints　without　reducing　much　of　the　carrying　capacity　of　joints.　The　oversized　bolt　holes　were　used　instead　of　standard　bolt　holes　and　the　triangular　vertical　stiffeners　were　used　instead　of　internal　diaphragms　have　little　impact　on　seismic　behavior　of　the　joint.　The　slippage　between　the　flanges　did　not　occur　at　the　same　time.　Most　bolts　had　a　certain　amount　of　tension　loss　during　the　loading　process.　©　2016,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.