This　paper　produced　four　frame　joints　strengthened　by　self-compacting　concrete　and　one　unstrengthened　joint　for　comparison.　Take　MTS　servo　loading　system　of　static　test　for　the　frame　joints　under　secondary　load,　to　study　the　influence　of　different　interface　treatments　for　the　seimic　performance.　The　interface　of　the　four　strengthened　joints　respectively　using　roughening　and　grooving　with　different　grooving　density.　The　results　of　the　damage　process,　strain　of　the　old　steel　and　new　steel,　the　load　-displacement　hysteresis　loops　was　analyzed,　and　it　was　found　that　the　cooperational　performance　of　the　old　concrete　and　new　concrete　was　good　when　using　self-compacting　concrete　to　strengthen　the　frame　joints　with　the　interface　treatments　roughening　and　grooving.　Considering　the　impact　of　the　interface　treatment,　the　ultimate　strength,　displacement,　and　displacement　ductility　coefficient　of　the　reinforced　joints　etc.　were　slightly　increased.　And　the　the　more　the　grooving　density　was,　the　better　the　strengthening　effect　was,　which　could　be　considered　in　the　design　of　strengthening　as　its　interface　treatment.　©　(2012)　Trans　Tech　Publications,　Switzerland.