Pile-anchor　reinforced　slopes　show　to　have　better　seismic　resistance　performance　than　other　traditional　supporting　structures.　However,　their　bearing　mechanisms　are　not　yet　fully　understood.　In　this　study,　dynamic　centrifuge　model　tests　are　carried　out　to　study　the　dynamic　response　and　synergistic　mechanism　of　rock　slope　reinforced　by　pile-anchor　composite　structures　under　seismic　loading.　The　centrifuge　model　is　devised　by　following　the　scaling　principle,　and　the　properties　of　the　model　materials　are　determined　by　laboratory　tests.　Some　parameter　studies　are　carried　out　considering　the　anchor　elastic　modulus,　pile　bending　stiffness,　and　pile　embedding　depth.　The　test　results　are　discussed　in　terms　of　the　failure　mechanism　of　the　slope　to　help　better　understand　the　synergistic　mechanism　of　the　pile-anchor　structure　in　seismically　active　areas.