A　combination　of　core　engineered　cementitious　composite　(ECC)　and　external　fiber-reinforced　polymer　(FRP)　composites　can　solve　the　problems　of　insufficient　ductility　and　durability　of　normal　concrete　(NC)　in　adverse　environments　and　improve　bearing　capacity.　However,　existing　studies　on　the　performance　of　ECC　strengthened　by　FRP　are　very　limited-particularly　the　research　on　large　rupture　strain　(LRS)　FRP-confined　ECC.　In　this　study,　an　experimental　investigation　of　LRS　FRP　and　conventional　glass　FRP-confined　ECC　cylinders　with　different　confinement　levels　under　axial　compression　is　presented.　It　is　found　that　the　application　of　external　FRP　jackets　leads　to　a　significant　improvement　in　the　compressive　strength　and　deformation　of　the　core　ECC.　LRS　FRP-confined　ECC　exhibits　a　higher　ultimate　deformation　than　conventional　FRP-confined　ECC.　The　dilation　behavior,　axial　stress-strain　behavior,　and　energy　dissipation　capacity　between　FRP-confined　ECC　and　FRPconfined　NC　under　the　same　confinement　level　are　compared,　and　the　former　exhibits　a　significantly　larger　ductility　and　energy　dissipation　capacity　than　the　latter.　The　results　also　indicate　that　most　existing　models　are　unable　to　accurately　predict　the　compressive　behavior　of　FRP-confined　ECC.　To　address　this,　a　dilation　model　and　an　axial　stress-strain　model　of　FRP-confined　NC　are　modified　to　extend　their　application　to　FRPconfined　ECC.