Many　natural　disasters　and　man-made　factors　may　cause　the　progressive　collapse　of　structures.　The　research　on　anti-progressive　collapse　usually　puts　aside　the　causes　of　collapse　and　directly　demolishes　the　key　columns　to　study　the　anti-collapse　performance　of　the　remaining　structure.　In　this　paper,　the　plane　steel　frame　subjected　to　impact　load　was　taken　as　an　example　to　analyze　the　specific　anti-collapse　performance　of　the　frame　structure.　A　simplified　impact　force　model　was　proposed　to　analyze　the　excitation　response　of　the　structural　system　to　the　impact　force.　The　simulation　results　of　the　impact　column　removal　method　were　compared　with　those　of　the　traditional　direct　column　removal　method,　and　the　influences　of　the　two　methods　on　the　failure　mode　and　dynamic　performance　were　analyzed　and　then　the　impact　responses　of　the　impact　blocks　with　different　mass,　velocity　and　energy　to　the　frame　structure　were　studied.　The　results　show　that　the　impact　column　removal　method　makes　the　joint　stress　distribution　complex,　causes　damage　to　adjacent　joints　and　components,　and　changes　the　stress　and　failure　mode,　while　the　traditional　direct　column　removal　method　underestimates　the　dynamic　response　of　the　remaining　structure;　in　addition,　the　dynamic　characteristics　of　frame　structure　are　closely　related　to　the　impact　energy,　especially　the　impact　velocity.　©　2022,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.