This　study　explored　the　impact　responses　of　a　steel–concrete–steel　sandwich　composite　panel　with　novel　interlocked　angle　connectors　(SCSP-IACs).　Impact　tests　on　nine　SCSP-IACs　were　performed　via　a　hemispherical　hammer.　The　failure　modes　of　all　specimens　were　determined　as　the　local　punching　failure　of　the　concrete　core.　Moreover,　the　impact　force–time　and　displacement–time　histories　and　the　permanent　deformation　were　discussed.　The　experiment　results　showed　that　increasing　the　steel　faceplate　thickness　and　concrete　core　height　enhanced　the　impact　performance　of　the　SCSP-IACs.　By　contrast,　increasing　the　IAC　spacing　weakened　the　impact　performance.　Moreover,　the　interlocking　bolts　slightly　affected　the　impact　responses　of　the　SCSP-IACs.　A　finite　element　(FE)　model　was　established　and　verified　with　test　data.　The　model　was　used　to　analyze　the　internal　forces　and　energy　absorption　of　the　SCSP-IACs　under　impact　loads.　The　internal　force　diagrams　of　the　panels　at　different　impact　stages　were　provided,　and　a　significant　hogging　moment　was　observed　from　the　bending　moment　distributions.　The　FE　results　also　showed　that　the　zones　close　to　the　center　of　the　panel　absorbed　most　of　the　impact　energy.　©　2023　Elsevier　Ltd