In　this　article,　a　new　retrofit　method　that　the　frame　column　is　strengthened　by　asymmetric　increased　single　lateral　concrete　section　is　proposed.　The　new　added　section　could　be　ordinary　reinforced　concrete,　bonded　prestressed　concrete,　or　unbonded　prestressed　concrete.　The　new　added　section　could　be　connected　with　the　column　through　anchor　rebars,　or　prefabricated　first,　then　be　connected　to　the　column　through　high　strength　bolts.　The　low　cyclic　reversed　load　experiment　has　been　launched　on　understanding　the　seismic　performance　of　one　unretrofit　specimen　and　six　retrofitted　specimens.　The　experiment　has　considered　four　main　factors　that　is　loading　direction,　material　adopted　on　the　new　added　section,　different　orders　of　unification　of　the　retrofit　column,　and　the　process　of　prestress　applying.　Based　on　the　experiment　study,　the　characteristics　including　the　failure　mode,　hysteresis　loops　behavior,　bearing　capacity,　ductility,　stiffness　degradation,　and　energy　dissipation　ability　are　demonstrated.　The　bearing　capacity　calculation　method　of　the　retrofit　column　under　compression-bending　action　is　established.　The　calculation　results　and　the　experiment　results　show　good　agreement.　Some　suggestions　for　seismic　design　of　the　retrofit　column　are　proposed.　The　experimental　results　show　that　the　retrofitted　column　has　good　seismic　performance　and　good　retrofit　effects.　The　research　results　could　be　references　to　the　practical　engineering　design　works.