The　seismic　behavior　study　of　cable-stayed　bridges　at　home　and　abroad　is　relatively　perfect,　and　abundant　achievements　have　been　obtained.　The　aseismic　performance　of　a　cable-stayed　bridge　ordinarily　can　meet　aseismic　requirements,　but　cable-stayed　bridge　expansion　joint　damages　and　approach　bridge　beam　collapses　often　happens　under　earthquakes.　The　study　on　the　collision　between　a　cable-stayed　bridge　and　its　approach　span　is　not　deep,　and　the　anti-collision　measures　study　is　not　systematical.　Here,　the　shock　absorption　effect　of　rubber　buffer　devices　on　impact　responses　between　a　cable-stayed　bridge　and　its　approach　span　was　investigated.　The　influence　law　of　rubber　buffer　devices　structural　parameters　on　impact　responses　between　a　cable-stayed　bridge　and　its　approach　span　was　analyzed　in　detail.