A　shaking　table　model　test　was　designed　and　completed　to　study　the　dynamic　response　and　damage　mechanism　of　counter-bedding　slopes　with　thin　and　thick　rock　combination，taking　the　pre-slide　slope　of　the　“Gongzha”　landslide　in　the　Xuelongnang　area　of　the　Jinsha　River　basin　on　the　Qinghai—Tibet　Plateau　as　a　prototype.　The　test　results　show　that　the　PGA　amplification　coefficient　increases　significantly　above　1/2　slope　height　of　the　slope，that　the　PGA　amplification　coefficient　changes　differently　from　inside　to　surface　at　different　elevations　of　the　slope，and　that　the　PGA　amplification　coefficient　increases　in　the　high-steep　area　but　decreases　at　the　foot　of　the　slope.　The　input　seismic　wave　frequency，amplitude　and　time　compression　ratio　all　have　a　relatively　large　effect　on　the　slope　dynamic　response.　When　the　input　wave　amplitude　is　relatively　large，the　PGA　amplification　coefficient　increases　significantly　under　high-frequency　wave　excitation.　When　the　input　wave　frequency　is　less　than　the　slope　natural　frequency，the　PGA　amplification　coefficient　increases　with　increasing　the　input　wave　frequency，and　after　exceeding　the　slope　natural　frequency，the　PGA　amplification　coefficient　decreases　at　the　surface　while　decreases　first　and　then　increases　at　the　inside　of　the　slope　with　the　input　wave　frequency.　The　effect　of　input　wave　amplitude　on　the　slope　dynamic　response　is　related　to　the　type　of　input　wave，and　the　slope　dynamic　response　law　is　different　under　different　types　of　input　wave　excitation.　Comprehensive　analysis　of　the　slope　dynamic　response　and　high-speed　camera　photo　records　indicates　that　the　PGA　amplification　coefficient　in　the　high-steep　area　of　the　slope　surface　is　the　largest　while　that　the　variation　law　of　PGA　amplification　coefficient　along　the　elevation　inside　the　slope　basically　follows　the　elevation　effect.　The　natural　frequency　of　the　slope　drops　significantly　at　0.2　g　amplitude　seismic　wave　excitation，and　at　this　time　the　slope　structure　changes　under　seismic　action.　The　damage　mode　is：cracks　initiating　in　the　upper　shoulder　of　the　high-steep　area→the　crack　area　expanding　downward→local　instability　of　the　upper　right　side　of　the　high-steep　area→the　instability　zone　expanding　to　the　whole　high-steep　area→the　rock　in　the　high-steep　area　being　shaken　down　from　top　to　bottom　along　with　part　of　the　lower　thin　rock　block，and　the　damage　process　is　accompanied　by　a　slight　uplift　of　the　lower　part　of　the　slope.　The　test　reveals　the　dynamic　response　law　and　damage　mechanism　of　counter-bedding　slope　with　thin　and　thick　rock　combination　under　the　action　of　earthquake，which　provides　a　basis　for　the　prevention　and　control　of　such　slopes.　©　2022　Academia　Sinica.　All　rights　reserved.