To　further　investigate　the　dynamic　characteristics　of　the　suspend-dome　structure,　based　on　a　prototype　structure　of　the　Lanzhou　Olympic　Complex　Gymnasium,　the　method　of　replacing　steel　with　Austenitic　304　stainless　steel　is　proposed.　Dynamically　scaled　model　with　a　geometrical　1:20　was　designed.　Shaking　table　dynamic　characteristics　test　was　conducted　using　the　white　noise　excitation　method.　The　response　of　the　scaled　model　was　identified　and　analyzed　by　the　transfer　function　method,　the　frequency　domain　decomposition　method,　and　the　Hilbert-Huang　Transformation,　respectively,　and　the　measured　natural　frequency　and　damping　ratio　were　obtained.　The　finite　element　models　of　the　prototype　and　scaled　model　were　built,　and　the　finite　element　software　ABAQUS　completed　modal　analysis.　The　simulation　results　of　vibration　modes　for　the　prototype　structure　and　scaled　model　were　analyzed.　The　study　shows　that　the　difference　between　the　experimental　and　simulation　results　for　the　natural　frequency　of　the　scaled　model　is　within　5%,　which　indicates　that　the　testing　points　are　reasonably　arranged,　the　test　method　is　correct　and　finite　element　modeling　method　is　reasonable.　The　measured　results　of　the　scaled　model　are　essentially　consistent　with　simulation　results　obtained　from　the　prototype　structure　by　the　similitude　conversion,　indicating　that　the　proposed　method　of　replacing　steel　with　Austenitic　304　stainless　steel　is　reasonable　and　scaled　model　is　well　designed.　The　correctness　of　the　similarity　relation　between　the　scaled　model　and　the　prototype　structure　is　verified.　The　model　has　closely　distributed　modes　and　more　vertical　modes.　The　first-order　damping　ratio　identified　by　the　dynamic　characteristics　test　is　between　1.85%　and　2%.