Taking the Luding Dadu River Bridge of Yakang Expressway as the research background, the spatial dynamic calculation model of the bridge is established, and the influence of rigid central buckle, flexible central buckle and energy-consuming central buckle on the seismic performance of the structure is studied by using nonlinear time-history analysis method. The energy dissipation central buckle is the first time to apply the anti-buckling energy dissipation steel supporting member to the suspension bridge, using the good hysteretic energy dissipation performance of steel to consume the seismic input energy and protect the main structure of the bridge from damage. The results show that the comprehensive performance of energy-dissipating central buckle is much better than that of traditional rigid central buckle and flexible central buckle, and it is an ideal central buckle suitable for large-span suspension Bridges in high-intensity earthquake area.