This　study　aims　to　analysis　the　dynamic　characteristics　and　seismic　collapse　behavior　of　aluminum　alloy　reticulated　shell　structures　especially　pay　attention　to　the　failure　mechanism　in　the　failure　stages.　The　collapse　process　of　shell　under　strong　seismic　was　studied　by　shaking　table　experiment,　and　the　seismic　response　and　collapse　of　structures　were　obtained.　By　establishing　the　finite　element　model　of　the　shell,　the　internal　force　changes,　collapse　mechanism　of　the　rod　under　seismic　are　analyzed.　The　seismic　response　differences　of　reticulated　shells　under　different　rise-span　ratios　and　initial　defects　were　analyzed.　Then,　the　performance　differences　between　aluminum　alloy　reticulated　shells　and　steel　reticulated　shells　in　natural　frequency　and　seismic　response　are　compared.　The　results　show　that　the　vertical　deformation　of　the　reticulated　shell　is　small　before　the　collapse,　which　is　mainly　the　rotation　of　the　joint　and　the　in-plane　bending　deformation　of　the　rods.　The　frequency　is　not　significantly　reduced　before　and　after　the　collapse,　and　the　stiffness　is　still　large　after　the　failure.　With　the　increase　of　the　rise-span　ratio,　the　collapse　load　decreases　first　and　then　increases.　Considering　the　initial　defects,　the　collapse　load　of　the　reticulated　shell　structure　is　significantly　reduced.　The　natural　vibration　period　of　the　aluminum　alloy　reticulated　shell　is　larger　than　that　of　the　steel　reticulated　shell.