In　the　current　study,　heterostructured　Ag@AgCl@AgI　nanotubes　were　synthesized　via　an　anion-exchange　reaction　between　Ag@AgCl　nanotubes　and　I-　anions.　Moreover,　their　photocatalytic　performance　towards　the　decontamination　of　dye　contaminants　were　examined.　These　prepared　photocatalysts　were　accordingly　characterized　using　high-resolution　scanning　electron　microscopy　(HR-SEM),　XRPD,　XPS,　field-emission　transmission　electron　microscopy　(FE-TEM),　and　photoluminescence　(PL)　spectroscopy.　The　structural　identification　analyses　confirmed　that　the　photocatalysts　had　nanotubular　morphology.　Compared　to　polyhedral　Ag@AgI　nanocomposites,　the　amalgamation　of　I-　ions　into　the　Ag@AgCl　framework　extraordinarily　improved　the　photocatalytic　performance.　The　synthesized　Ag@AgCl@AgI　nanotubes　can　also　be　reused　due　to　their　high　stability.　Under　visible-light　irradiation,＞　91.8%　of　Rhodamine　B　(RhB)　was　degraded　within　45　min　using　the　catalyst　AI-2　(Cl-/I-=　1:1).　The　radical　trap　experiments　indicated　that　the　photodegradation　of　RhB　was　driven　by　the　participation　of　superoxide　radical　and　the　action　of　holes.　Due　to　the　surface　plasmon　resonance　effect,　the　photocatalyst　AI-2　demonstrated　higher　photocatalytic　performance,　enhanced　surface　area　and　photoelectron　transfer,　which　is　also　ascribed　to　its　unique　heterostructured　configuration.