Based　on　the　simplicity　and　the　insufficiency　of　the　mechanical　properties　of　traditional　cable　domes,　a　spatial　three-strut　and　double-hoop　cable　dome　was　proposed.　A　method　for　calculating　the　prestress　of　the　struts　and　cables　which　integrated　the　displacement　method　and　the　nodal　equilibrium　method　was　proposed　to　calculate　and　compare　the　difference　of　prestress　distribution　of　the　cable　domes　under　the　conditions　of　considering　self-weight　or　not.　Calculation　tables　of　the　prestress　were　given　and　the　influence　of　various　parameters　on　the　structural　performance　was　compared　under　different　parameters.　The　results　showed　that　the　prestress　values　for　most　members　increased　in　various　degrees　when　the　self-weight　was　considered,　that　the　increase　of　the　strut　height　and　span　ratio　would　reduce　the　initial　prestress　of　almost　all　the　members　in　the　cable　dome,　and　that　the　increase　of　the　strut　height　had　more　significant　effects　than　that　of　the　increase　of　the　span　ratio.　Therefore,　the　scheme　of　increasing　the　strut　height　was　more　often　adopted　in　engineering　practice.　©　2020,　Engineering　Mechanics　Press.　All　right　reserved.