A　double　strut　cable　dome　structural　system　was　presented　to　improve　the　mechanical　behaviour　of　a　cable　dome.　This　structure　has　good　stability　and　is　convenient　to　construct.　To　investigate　its　construction　method　and　static　performance,　a　structural　model　with　a　6-m　diameter　was　designed.　From　the　nodal　equilibrium　equation,　the　calculation　formulas　for　the　prestress　distribution　with　self-weight　considered　were　deduced.　Two　types　of　construction　methods,　namely,　assembling　at　high　altitude　and　integral　lifting,　were　adopted　in　the　shape-forming　process　of　the　double　strut　cable　dome,　monitoring　the　internal　force　of　the　cable-strut　components　and　the　structural　deformation.　According　to　loading　tests　under　full-span　load　and　half-span　load,　the　static　behaviour　of　the　structure　was　obtained　and　compared　with　the　results　from　finite　element　analysis.　Using　the　formulas　deduced　in　this　paper,　the　actual　initial　prestress　considering　self-weight　for　a　double　strut　cable　dome　can　be　obtained　accurately.　This　structure　was　suitable　for　tensioning　the　outer　diagonal　cables　to　apply　prestress.　Combined　with　the　construction　method　for　integral　lifting,　the　difficulty　and　workload　of　the　construction　process　can　clearly　be　reduced,　making　the　structure　favourable　for　engineering　application.　Under　an　external　load,　the　internal　force　of　the　ridge　cables　and　inner　diagonal　cables　decreases　and　the　internal　force　of　the　other　components　increases.　The　results　of　the　model　tests　were　in　good　agreement　with　those　of　the　finite　element　analysis.