The　use　of　heterojunctions　with　Z-scheme　photocatalysts　holds　great　promise　for　enhancing　the　photocatalytic　degradation　efficiency　of　antibiotics.　In　this　study,　we　report　the　construction　of　a　novel　heterostructure　by　in-situ　growth　of　the　ultrathin　polymeric　carbon　nitride　(PCN)　on　the　electrospun　Bi2WO6　nanofibers　for　improved　photocatalytic　tetracycline　(TC)　degradation　under　visible　light.　Our　gas-solid　reaction　strategy　enables　the　formation　of　uniform　and　intimate　junctions　between　the　PCN　nanosheets　and　the　Bi2WO6　nanofibers,　resulting　in　a　well-contacted　interface　that　remarkably　accelerates　the　separation　and　transfer　of　the　photogenerated　charge　carriers.　The　optimized　PCN/Bi2WO6　photocatalyst　exhibits　a　significant　TC　degradation　rate　of　89.5　%　under　visible　light,　which　is　1.4-fold　and　2.0-fold　of　the　pure　PCN　and　Bi2WO6　photocatalysts,　respectively.　Our　innovative　design　philosophy　opens　up　a　new　horizon　for　the　development　of　efficient　Z-scheme　heterostructured　photocatalysts　for　antibiotic　degradation.