Branch-type　anchor　is　a　new　type　of　bolt　independently　developed　by　the　authors,　which　has　broad　application　prospects.　In　order　to　explore　the　load-bearing　characteristics　of　branch-type　anchors,　an　indoor　test　model　was　constructed,　and　a　series　of　pull-out　tests　was　carried　out　for　different　embedding　depths,　branch　diameters,　and　double-branch　spacing.　The　corresponding　load-displacement　curves　were　obtained,　and　non-dimensional　processing　for　part　of　the　data　was　conducted　to　obtain　the　relationship　curve　between　the　buried　depth　ratio　and　the　load　factor.　Finally,　a　simplified　mechanical　model　was　used　to　derive　the　calculation　formula　for　the　end　resistance　and　the　pull-out　ultimate　bearing　capacity　of　the　branch-type　anchor.　The　research　results　show　that　there　is　a　nonlinear　relationship　between　the　embedment　depth　and　the　ultimate　bearing　capacity,　and　a　critical　embedment　depth　exists.　The　plate　diameter　has　the　most　significant　impact　on　the　pull-out　bearing　capacity,　which　has　a　linear　growth　relationship　with　the　ultimate　bearing　capacity.　The　ultimate　bearing　capacity　is　2-5　times　higher　than　that　of　a　straight　bolt.　The　bearing　capacity　of　the　double　plate　can　be　fully　used　when　the　separation　distance　of　the　double　plate　is　4　times　of　the　plate　diameter.　Since　the　soil　is　mainly　sheared　at　the　initial　stage　of　loading,　the　initial　slope　of　the　load-displacement　curve　of　the　double-branch　anchor　is　much　larger　than　that　of　the　single-branch　anchor.　The　sudden　change　point　of　the　slope　of　the　relationship　between　the　embedment　depth　ratio　and　the　load　factor　is　the　critical　embedment　ratio,　which　is　3.02.　The　results　obtained　by　this　formula　are　basically　consistent　with　those　of　the　four　testing　groups,　which　verifies　the　validity　of　the　calculation　formula.　The　research　results　have　important　theoretical　and　practical　significance　for　the　design　and　engineering　application　of　the　branch-type　anchor.　©　2021,　Science　Press.　All　right　reserved.