The　dynamic　response　of　the　Engineering　Cementitious　Composite　(ECC)　columns　under　multiple　impacts　was　investigated　via　a　drop-hammer　impact　test.　The　effect　of　four　factors,　including　axial　compression　ratio,　impact　velocity,　reinforcement　ratio,　and　stirrup　ratio　on　the　dynamic　response　of　columns　were　considered.　The　deformation　mechanisms,　cracking　details　(such　as　cracking　pattern,　the　maximum　width　and　the　number　of　cracks),　and　the　time-history　curves　of　impact　force　and　displacement　were　evaluated　and　contrasted　with　those　of　the　reinforced　concrete　(RC)　columns.　Furthermore,　the　degree　of　internal　damage　and　bending　deformation　of　ECC　columns　under　multiple　impacts　were　investigated.　The　results　show　that　ECC　column　could　absorb　nearly　twice　as　much　energy　as　the　RC　column　while　maintaining　structural　integrity,　and　it　could　bear　more　impacts　under　the　same　reinforcement　layout　and　axial　compression　conditions.　The　damage　factor　D　in　the　deformation　zone　of　ECC　column　was　about　1/127　of　RC　column　under　the　same　impact　energy　of　7816　J,　this　indicated　that　the　ECC　column　has　a　slight　tendency　towards　damage　and　bending　deformation,　while　the　RC　column　had　undergone　brittle　shear　failure.　Moreover,　when　the　impact　energy　was　7816　J　and　the　axial　compression　ratio　increased　from　0.13　to　0.4,　the　peak　impact　force　of　the　ECC　column　increased,　while　the　maximum　mid-span　displacement　and　residual　mid-span　displacement　decreased.　With　the　increase　of　reinforcements,　the　number　of　fine　cracks　increased,　but　the　maximum　crack　width,　peak　impact　force,　and　maximum　mid　span　displacement　decreased.　The　experimental　results　presented　herein　provide　benchmark　data　for　the　practical　engineering　applications　of　ECC　columns　subjected　to　horizontal　impact　forces.　©　2025