This　paper　presents　a　novel　high　bolt　screw　(HBS)　active　joint　engineered　to　enhance　eccentric　tensile　and　compressive　support　within　subway　deep　foundation　pits,　thereby　bolstering　underground　structural　stability　and　safety.　This　comprehensive　investigation　of　the　HBS　active　joint　design　included　an　overview,　operational　principles,　stiffness　analysis,　parameters,　and　strength　verification.　To　assess　the　load-bearing　and　bending　capacities　of　HBS　joints　accurately　under　eccentric　loading　conditions,　a　series　of　indoor　loading　tests　were　conducted　on　two　joints.　The　resulting　data　included　load-displacement,　moment-rotation,　and　load-strain　curves　and　failure　modes.　The　results　of　the　numerical　simulations　closely　matched　the　laboratory　results,　verifying　their　reliability.　Parametric　studies　were　then　performed　to　examine　how　different　design　parameters　affect　eccentric　compression　and　bending.　The　findings　revealed　that　the　yield　load　and　moment　resistance　depend　on　the　eccentric　distance　but　not　the　angle.　The　load-bearing　and　bending　performance　of　a　joint　is　positively　correlated　with　parameters　such　as　the　screw　diameter,　extension　length,　barrel　nut　height　and　thickness,　and　steel　tube　thickness,　although　the　impact　of　each　parameter　varies.　Accurate　formulae　for　calculating　the　moment　resistance　and　initial　rotational　stiffness　were　derived,　yielding　a　reliable　moment-rotation　model.　These　results　highlight　the　exceptional　load-bearing　and　bending　capacities　of　HBS　joints,　offering　key　insights　into　the　design　of　advanced　support　systems　for　subway　foundation　pits.