This　paper　experimentally　investigates　the　progressive　collapse　performance　of　planar　frame　structure　with　engineered　cementitious　composites　(ECC)　under　middle　column　removal　scenario.　One　normal　concrete　specimen　and　two　ECC　specimens　were　used　for　experiments.　Quasi-static　vertical　loading　was　imposed　onto　the　middle　column,　and　structural　response　was　analyzed　for　the　specimens　with　different　concrete　and　reinforcement　ratio.　Furthermore,　the　impact　of　ECC　on　the　behavior　of　planar　frame　structure　to　resist　progressive　collapse　was　evaluated.　Experimental　results　indicated　that　ECC　specimens　exhibited　multi-cracking　behavior　with　limited　crack　width,　and　their　progressive　collapse　performance　including　ductility,　horizontal　reaction,　bending　moment　and　rotation　capacity　of　plastic　hinge　can　be　improved　significantly　in　three　stages　of　resisting　mechanisms.　The　resistance　force　and　energy　absorption　can　be　reinforced　over　several　times　in　elastic　stages　while　the　reinforcing　effects　can　not　continue　in　compressive　arch　stage　and　catenary　stage.　The　ultimate　resistance　in　catenary　stage　is　largely　determined　by　the　reinforcement　ratio.　Finally,　the　ECC　is　proved　to　be　highly　effective　in　reinforcing　progressive　collapse　resistance,　which　provides　a　basic　insight　into　the　application　of　ECC　building　structure　in　engineering.　©　2022