Patients　with　pulsatile　tinnitus　(PT)　have　unstable　treatment　effects　after　resurfacing　surgery.　Flow-diverting　stents　(FDS)　are　proposed　as　a　potential　method　for　the　treatment　of　PT,　but　the　therapeutic　effect　is　not　clear.　This　study　aimed　to　investigate　the　efficacy　of　FDS　in　the　treatment　of　patients　with　PT　induced　by　sigmoid　sinus　diverticulum　(SSD)　and　sigmoid　sinus　wall　dehiscence　(SSWD).　In　addition,　we　aimed　to　explore　the　treatment　mechanism　of　PT.　Transient-state　multiphysics　coupling　numerical　simulation　method　based　on　computed　tomography　angiography　of　five　patients　was　used　to　clarify　the　biomechanical　and　acoustic　states　before　and　after　FDS　placement.　FDS　was　placed　to　prevent　the　blood　flow　from　impacting　the　vessel　wall　in　the　SSD　and　SSWD　areas.　Low　blood　flow　velocity　(＜0.0391　m/s),　high　relative　residence　time　(＞10　Pa-1),　and　low　wall　shear　stress　of　SSD　might　lead　to　thrombosis　after　FDS　placement.　The　average　pressure　on　the　SSWD　area　of　each　patient　decreased　by　13.77%,　18.82%,　29.23%,　19.03%,　and　11.20%.　The　average　displacement　of　the　vessel　wall　on　the　SSWD　area　showed　acute　pulsation　and　decreased　by　15.29%,　14.64%,　30.22%,　41.03%,　and　21.28%.　The　average　sound　pressure　level　at　the　tympanum　decreased　by　14.01%,　9.33%,　17.66%,　18.88%,　and　25.18%,　respectively.　In　brief,　FDS　was　placed　to　avoid　blood　flow　impacting　vessels　and　reduce　the　vibration　of　vessels　in　the　short　term,　thereby　attenuating　the　degree　of　PT.　The　long-term　prognosis　was　that　the　SSWD　area　was　blocked　after　SSD　thrombosis.　Therefore,　FDS　might　be　an　effective　method　for　the　treatment　of　PT　induced　by　SSD　and　SSWD.　This　study　would　provide　a　theoretical　basis　for　the　treatment　of　PT　and　an　exploration　of　FDS　design　in　the　treatment　of　PT.