Antibiotics,　particularly　tetracycline　(TC),　are　extensively　used　in　medicine,　agriculture,　animal　husbandry,　and　the　food　industry　due　to　their　bacteriostatic　and　antibacterial　properties.　However,　the　widespread　use　of　antibiotics　has　led　to　serious　consequences,　particularly　in　the　form　of　water　pollution　and　the　emergence　of　numerous　antibiotic-resistant　microorganisms.　Therefore,　it　is　essential　to　implement　effective　measures　to　mitigate　these　environmental　impacts.　In　this　paper,　we　introduce　a　novel　BiOCl@Bi-carbon　heterojunction　derived　from　Bi-MOF.　The　synthesized　samples　were　thoroughly　characterized　through　various　techniques.　The　results　demonstrate　that　BiOCl　was　successfully　synthesized　on　the　surface　of　Bi-MOF　via　in　situ　transformation,　and　that　Bi-MOF　was　converted　into　Bi-doped　porous　carbon　(Bi-carbon)　after　high-temperature　annealing　treatment.　The　coupling　of　BiOCl　with　Bi-carbon　significantly　enhances　the　photocurrent　density.　The　photo-　catalytic　activity　of　the　samples　was　effectively　evaluated　by　measuring　the　degradation　of　TC,　with　BiOCl@Bicarbon　demonstrating　the　highest　photocatalytic　efficiency,　achieving　a　degradation　rate　of　96.27　%　for　TC.　Additionally,　BiOCl@Bi-carbon　exhibits　excellent　stability.　Its　outstanding　photocatalytic　performance　indicates　significant　potential　for　practical　applications.　Furthermore,　we　analyze　the　mechanism　underlying　the　photo-　catalytic　degradation　of　TC　at　the　end　of　the　study.