Because　of　good　impact　toughness　and　high　load　carrying　capacity,　RPC-filled　steel　tubular　columns　promise　to　be　good　blast-resistant　and　impact-resistant　structural　members.　Experimental　investigation　for　impact-resistant　property　of　RPC-filled　steel　tubular　columns　is　conducted　in　this　paper.　Dynamic　response　of　the　columns　under　axial　impact　loading　is　studied　by　means　of　numerical　simulation　method.　Increase　coefficient　of　load　carrying　capacity　and　ratio　of　load　carrying　capacity　of　steel　tube　to　that　of　RPC　core　in　the　columns　are　obtained.