This　study　proposed　a　new-type　on-site　all-bolted　connection　that　connects　a　truss　to　a　column　and　connects　a　column　to　a　column　in　modularized　prefabricated　multi-story　and　high-rise　steel　structures.　The　components　in　a　module　are　welded　together　in　the　factory,　and　various　modules　are　assembled　together　quickly　using　the　proposed　connection　on　site.　The　connection　connects　a　truss　to　a　column　through　cover　plates　that　extend　from　the　flanges　as　well　as　through　the　vertical　connecting　plates　and　the　joint　flitches.　The　stiffness　of　the　connection　undergoes　step-like　changes　as　the　load　changes.　During　an　earthquake,　the　cover　plates　slip　relative　to　the　chord　members　of　the　truss,　dissipating　energy.　This　study　conducted　tests　and　finite　element　analysis　on　the　seismic　performance　of　two　specimens　of　the　proposed　bolted　connection　in　which　slip　occurs　between　the　cover　plate　and　chord　members,　and　some　seismic　performance　data　associated　with　the　connection,　such　as　hysteretic　performance,　skeleton　curve,　ductility,　rotational　capacity,　stiffness　degradation　and　failure　mode,　are　obtained.　Some　parameters　that　affect　mechanical　and　seismic　properties　of　the　connection　were　studied,　and　the　slipping　rule　of　the　contact　surfaces　of　the　bolted　connection　was　obtained.　A　comparative　analysis　of　the　test　results　for　the　slipping　connection　and　the　non-slipping　connection　shows　that　the　slipping　connection　exhibited　improved　ductility　and　energy　dissipation　capacity　without　significantly　reducing　the　ultimate　bearing　capacity,　and　most　of　the　energy　was　dissipated　from　the　slip.　The　proposed　connection　can　be　used　for　structures　in　seismic　regions.