In　order　to　investigate　the　size　effect　on　seismic　behavior　of　reinforced　concrete　columns,　six　reinforced　concrete　columns　under　low　cycle　reversed　loading　with　three　different　dimensions,　including　300,　500　and　700　mm,　and　different　axial　load　ratios,　were　tested.　The　damage　mode,　hysteretic　behavior,　skeleton　curves,　ductility　and　energy　dissipation　were　discussed.　The　influences　of　section　size　on　bearing　capacity,　ductility,　energy　dissipation　and　plastic　hinge　rotation　ability　were　analyzed.　The　results　indicate　that　the　flexural　capacity,　ductility　and　plastic　hinge　rotation　capacity　of　reinforced　concrete　column　decrease　as　section　size　increases,　due　to　obvious　size　effect.　Size　effect　of　average　energy　consumption　coefficient　is　also　apparent,　which　decreases　as　section　size　increases.　Then　on　the　basis　of　experiment,　a　practical　calculation　model　of　flexural　strength　of　reinforced　concrete　column　considering　section　size　effect　coefficient　of　specimen　subjected　to　cyclic　loading　was　proposed.