In　earthquake-prone　areas,　pile-anchor　structures　are　widely　employed　for　slope　reinforcement　due　to　their　reliable　performance.　Current　research　has　primarily　focused　on　static　and　quasi-static　analyses　of　slopes　reinforced　by　using　pile-anchor　structures,　with　limited　investigation　into　their　dynamic　response.　In　this　work,　the　finite　element　method　(FEM)　is　used　to　study　the　dynamic　behavior　of　a　pile-anchor　slope　system,　and　the　extended　finite　element　method　(XFEM)　is　used　to　simulate　the　progressive　failure　processes　of　piles.　Three　different　reinforcement　schemes,　which　include　no　support,　pile　support,　and　pile-anchor　support,　are　considered　to　examine　the　performance　of　the　pile-anchor　structure.　The　simulation　results　suggest　that　the　pile-anchor　structure　displays　a　reduction　of　39.6%　and　40.6%　in　the　maximum　shear　force　and　bending　moment　of　the　piles,　respectively,　compared　to　the　pile　structure.　The　XFEM　is　utilized　to　model　the　progressive　failure　process　of　the　piles　subjected　to　seismic　loading.　We　find　that　crack　initiation　in　the　pile　body　near　the　slip　surface,　for　both　the　pile　supported　and　the　pile-anchor　supported　conditions,　occurs　when　the　peak　ground　acceleration　arrives.　Crack　growth　in　the　piles　completes　in　a　very　short　period,　with　two　distinct　increments　of　crack　area　observed.　The　first　increment　occurs　when　the　peak　ground　acceleration　arrives　and　is　significantly　larger　than　the　second　increment.　Consequently,　for　the　seismic　design　of　piles,　it　is　necessary　to　strengthen　the　pile　body　around　slip　surfaces.　The　novelty　of　this　paper　is　that　we　realize　the　simulation　of　crack　initiation　and　propagation　in　piles　subjected　to　seismic　loading.