Seven RC columns were tested under cyclic lateral load and constant axial load to study the seismic behavior of reinforced concrete column strengthened with high ductility polyester fiber. Three unreinforced columns were tested, and four other columns were tested after strengthened with high ductility polyester fiber sheets. The bearing capacity of three unreinforced columns was low. And the energy dissipation capacity and ductility were also relatively low. The cracks of reinforced specimen appeared relatively late and the cracks developed slowly. The strength, ductility and energy dissipating capacity of the retrofitted columns were improved at different degrees. And the ductility increase was more obvious. The efficiency of the use of fiber cloth can be improved through adopting the measures of improving the reinforcement ratio the plastic hinge region and adopting the measures of improving the length of longitudinal reinforcement, and the seismic behavior of RC column strengthened with high ductility polyester fiber increased.