Molybdenum　sulfide　(MoS2)　with　layered　structure　has　emerged　as　a　promising　anode　material　for　sodium　ion　batteries　(SIBs)　in　light　of　its　particular　surface　chemistry　and　physical　structures.　However,　the　MoS2-based　SIBs　usually　suffered　from　the　weaknesses　of　the　low　rate　capability　and　poor　cycling　stability　induced　by　the　sluggish　kinetics　of　Na+　intercalation　and　the　diffluent　discharge　products.　Herein,　the　defective　MoS2　nanocrystals　and　sulfur　nanodots　simultaneously　embedded　in　sulfurized　polyacrylonitrile　(SPAN)　fibers　were　fabricated　via　an　electrospunning　technology,　followed　by　a　simple　annealing　treatment.　The　unique　architecture,　in　which　MoS2　nanolayers　and　sulfur　nanodots　were　mounted　inside　the　SPAN　fiber,　provided　multi-entry　and　short-range　channel　for　sodium　ion　to　ensure　a　fast　kinetics.　Besides,　sulfur　defects　within　MoS2　produced　the　strong　chemical　interaction　for　fixing　soluble　discharge　products.　As　a　result,　the　electrode　performed　outstanding　sodium-storage　performance　with　a　superior　long　cycling　life　(8000　cycles　at　5　A　g−1,　15,000　cycles　at　10　A　g−1)　and　excellent　rate　capability　(212　mAh　g−1　at　25　A　g−1).　The　full　cell　fabricated　by　using　Na3V2(PO4)3　as　the　cathode　also　delivered　good　energy　storage　performance　and　successfully　powered　a　group　of　light-emitting　diode.　©　2020　Elsevier　B.V.