A　new　type　of　fiber-reinforced　polymer　(FRP)　with　a　tensile　rupture　strain　of　more　than　5%　was　used　for　the　seismic　retrofitting　of　reinforced　concrete　(RC)　square　columns　in　this　paper.　A　control　column　and　9　FRPwrapped　RC　square　columns　were　prepared　with　different　number　of　FRP　layers　and　FRP　types.　The　seismic　performance　was　comprehensively　discussed　and　analyzed　in　terms　of　the　failure　modes,　hysteretic　behaviors,　cumulative　energy　dissipation　and　FRP　strain　evolution.　Experimental　results　showed　that　the　ductility　of　specimens　had　a　remarkable　improvement　as　the　confinement　stiffness　increased.　Moreover,　the　buckling　of　longitudinal　bars　was　restricted　and　postponed.　Numerical　analysis　was　conducted　in　OpenSees　to　further　research　the　seismic　performance　of　specimens　based　on　an　LRS　FRP-confined　concrete　model　and　a　reinforcing　bar　buckling　model　considering　FRP　confining　effect.　The　simulated　results　were　in　close　agreement　with　the　experimental　results.　Parametric　analysis　was　also　conducted　to　investigate　the　influence　of　the　FRP　wrapping　thickness,　axial　compression　ratio　and　longitudinal　reinforcement　ratio　on　the　seismic　performance.