Abstract: 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.