A　doubly-salient　relative　permeance　method　is　presented　herein　to　predict　the　magnetic　field　of　bearingless　flux-switching　permanent-magnet　machines　(BFSPMMs).　Firstly,　the　subdomain　model　method　is　used　to　compute　the　magnetic　field　of　slotless　BFSPMMs.　Then,　the　slotting　effect　of　the　stator　and　rotor　is　obtained　by　the　doubly-salient　relative　permeance　method.　By　combining　the　two　above,　the　air-gap　magnetic　field　of　slotted　BFSPMMs　can　be　obtained.　The　doubly-salient　relative　permeance　method　is　based　on　the　theory　of　the　subdomain　model　method.　The　whole　doubly-salient　structure　is　divided　into　several　subdomains,　and　the　Laplace　equations　for　subdomains　are　established.　Then,　according　to　the　boundary　conditions　between　subdomains　and　the　core,　and　the　continuity　conditions　between　adjacent　subdomains,　the　equations　are　solved　to　calculate　the　slotting　effect.　Based　on　the　proposed　analytical　model,　the　flux　density　and　electromagnetic　performances　including　back-electromotive　force　(EMF),　torque,　and　suspension　force　are　predicted　and　compared　with　the　finite　element　method　results.　Furthermore,　the　back-EMF　of　the　prototype　motor　is　measured　and　the　suspension　experiments　are　carried　out　based　on　the　analytical　method.　The　comparison　results　and　experiment　results　verify　the　validity　of　the　analytical　method.