Based　on　the　experiment　on　concrete　columns　confined　with　polyethylene　fiber　reinforced　polymer　(PEFRP)　sheets　under　axial　compression,　the　authors　emphasized　on　analyzing　failure　configuration,　bearing　capacity,　stress-strain　curve　and　ductility.　It　is　shown　that:　1)　comparing　with　the　specimen　without　being　confined,　bearing　capacity　of　concrete　quadrate　columns　confined　by　PEA-L-2,　PEA-L-3,　PEB-L-2　and　PEB-L-3　improves　10%,　35%,　27%　and　30%　respectively,　peak　strain　improves　195%,　80%,　207%　and　182%　respectively;　2)　bearing　capacity　of　concrete　circular　columns　confined　by　PEA-C-2,　PEA-C-3,　PEB-C-2　and　PEB-C-3　improves　11%,　21%,　37%　and　53%　respectively,　peak　strain　improves　112%,　150%,　159%　and　142%　respectively.　Toughness　index　could　be　adopted　to　evaluate　the　ductility　of　constraint　column,　and　the　result　shows　that　PEA　is　better　than　PEB　in　improving　column　toughness　index　I1,　but　PEB　which　has　high　elongation　rate　improve　column　late　ductility　effect　more　apparent.