Submarine　pipelines　are　highly　susceptible　to　lateral　buckling　failure　under　service　conditions　of　high　temperature　and　pressure.　While　existing　bearing　capacity　evaluation　methods　mainly　focus　on　flat　seabeds,　research　on　the　ultimate　bearing　capacity　of　pipelines　buried　in　sloping　seabeds　is　limited.　This　study　applies　the　FELA　method　to　analyze　the　ultimate　bearing　capacity　of　pipelines　buried　in　inclined　sandy　seabeds　under　various　loading　directions.　The　results　reveal　that　in　sloping　seabeds,　the　minimum　ultimate　bearing　capacity　(Pu,b)　does　not　occur　in　the　vertical　direction,　but　rather　deviates　toward　the　outward　normal　direction　of　the　seabed　surface,　moving　toward　the　foot　of　the　slope.　The　Pu,b　is　only　57%　of　the　uplift　bearing　capacity　in　the　extreme　case.　A　predictive　model　was　proposed　to　accurately　determine　the　direction　of　Pu,b.　The　results　also　indicated　that　increasing　the　seabed　slope　angle　leads　to　a　significant　reduction　of　bearing　capacity,　while　increases　in　the　internal　friction　angle　of　the　seabed　and　the　pipeline-soil　interface　friction　angle　enhance　the　bearing　capacity.　Moreover,　the　design　code　of　DNV　(2017)　was　identified　as　unsafe　due　to　its　omission　of　seabed　inclination　effects,　and　the　Pu,b　is　only　75%　of　the　best　estimate　of　DNV　(2017)　in　the　extreme　case.　A　reduction　factor　model　was　developed　to　mitigate　this　gap,　offering　a　more　reliable　framework　for　evaluating　the　bearing　capacity　of　pipelines.