Multi-disk　anchor　rod　is　a　newly　developed　anchoring　structure,　which　has　excellent　engineering　characteristics　compared　with　ordinary　anchor　rod.　On　the　basis　of　the　laboratory　model　test　research　of　the　multi-disk　anchor,　a　theoretical　calculation　formula　for　the　ultimate　bearing　capacity　of　the　multi-disk　anchor　is　deduced　through　the　limit　equilibrium　theory.　It’s　validity　is　verified　by　the　correspondence　between　the　calculation　result　and　the　measured　data.　To　further　grasp　the　load　transfer　characteristics　of　the　multi-disk　anchor,　an　on-site　slope　anchoring　prototype　test　is　carried　out.　The　data　obtained　from　the　on-site　multi-disk　anchor　pull-out　test　are　used　to　study　the　influence　of　the　diameter　of　support　disks,　the　spacing　of　support　disks　and　the　number　of　support　disks　on　the　ultimate　bearing　capacity　and　deformation　control　ability　of　multi-disk　anchors.　The　test　results　show　that　in　silty　clay,　when　the　distance　between　the　support　disks　is　greater　than　or　equal　to　4　times　the　diameter　of　the　support　disks,　it　can　be　considered　that　each　support　disk　can　work　independently,　giving　full　play　to　the　bearing　capacity　of　the　multi-disk　anchor;　under　the　same　conditions,　compared　with　ordinary　bolts,　as　the　disk　diameter　increases　from　300　mm　to　500　mm　and　the　number　of　disks　increases　from　1　to　3,　the　pull-out　capacity　of　the　multi-disk　anchor　increases　significantly,　and　its　deformation　control　ability　is　also　greatly　enhanced.　The　test　results　also　show　that　the　axial　force　transmission　curve　of　the　multi-disk　anchor　rod　has　a　sudden　change　at　the　position　of　the　support　disk,　presenting　a　steep　drop,　which　fully　reflects　the　contribution　of　the　support　disk　in　the　uplift　resistance.　The　research　results　have　laid　a　good　theoretical　foundation　for　the　engineering　application　of　multi-disk　anchor　rods.　©　2023　Academia　Sinica.　All　rights　reserved.