A　type　of　Levy　cable　dome　with　double　struts　is　presented　to　improve　the　mechanical　behavior　of　cable　domes.　This　structure　has　a　good　stability　and　is　convenient　for　construction　due　to　the　fact　that　each　upper　node　is　connected　to　two　inclined　struts.　To　solve　its　force　finding　problem,　according　to　the　balanced　equations　of　connections,　the　calculation　formulas　of　prestress　distribution　with　self-weight　considered　are　deduced.　The　calculation　tables　of　cable　dome　under　different　parameters　are　given　to　investigate　the　mechanical　behavior.　The　differences　of　prestress-state　with　and　without　self-weight　are　compared,　and　the　proposed　formulas　are　checked　using　finite　element　iteration　method.　The　results　show　that　with　the　increase　of　rise-span　ratio　and　height　of　struts,　the　initial　prestress　decreases　for　all　components.　Under　self-weight,　the　internal　force　of　inner　ridge　cables　decreases,　while　the　internal　force　of　the　most　outer　diagonal　cables　and　hoop　cables　increases　significantly.　Using　the　formulas　deduced　in　this　paper,　the　actual　initial　prestress　distribution　considering　self-weight　for　Levy　cable　dome　with　double　struts　can　be　obtained　rapidly　and　accurately,　providing　a　reference　for　engineering　design.　©　2017,　Engineering　Mechanics　Press.　All　right　reserved.