In　order　to　research　the　firer　type　effect　on　the　impact　behavior,　the　flexural　impact　performance　of　concrete　reinforced　with　natural　cellulose　(Buckeye　Ultra-Fiber　500),　steel　fibers　and　hybrid　fibers　were　investigated　systematically.　The　initial-crack　impact　life,　the　failure　impact　life　and　impact　ductility　are　analyzed　with　statistic　analysis　method.　The　experimental　results　indicate　that　cellulose　fibers　can　highly　improve　the　initial-crack　impact　performance　and　steel　fibers　can　remarkably　improve　the　failure　impact　performance.　When　the　cellulose　fiber　content　is　1.2　kg/m3,　the　initial-crack　impact　life　of　cellulose　fiber　reinforced　concrete　is　2.4　times　higher　than　that　of　plain　concrete,　and　is　similar　to　that　of　concrete　reinforced　with　steel　fibers　of　64　kg/m3.　When　the　reinforced　concrete　with　steel　fibers　of　78　kg/m3　mix　with　cellulose　fibers　of　1.0　kg/m3,　the　failure　impact　life　is　8.1　times　higher　than　that　of　plain　concrete.　Reinforced　concrete　with　cellulose　and　steel　hybrid　fibers　can　remarkably　improve　the　flexural　impact　performance　and　can　fully　have　the　advantages　of　the　two　fibers.