The　photocatalytic　peroxymonosulfate　(PMS)　activation　process　offers　great　potential　for　organic　wastewater　treatment.　In　this　study,　enol-incorporated　carbon　nitride　(ECN)　catalysts　were　used　for　PMS　activation　to　degrade　organic　pollutants　under　visible-light　irradiation.　Our　experimental　and　theoretical　results　revealed　that　the　incorporation　of　enol　into　the　poly-heptazine-based　carbon　nitride　framework　effectively　tuned　the　electronic　structure.　The　obtained　ECN　showed　promoted　PMS　activation　capability,　along　with　increased　visible-light　harvesting　ability　and　improved　photogenerated　charge　separation.　As　a　result,　an　excellent　performance　with　a　bisphenol　A　removal　rate　of　100%　within　20　min　and　a　total　organic　carbon　(TOC)　removal　rate　of　86%　in　30　min　was　achieved　in　the　Vis-PMS/ECN　process.　This　was　because　ECN　functioned　as　an　efficient　photocatalyst　as　well　as　PMS　activator,　which　enabled　the　PMS　activation　process　to　proceed　smoothly　for　center　dot　SO4-　production　under　visible-light　irradiation.　These　findings　could　offer　some　guidelines　for　the　development　of　efficient　metal-free　photocatalysts　in　the　persulfate-based　advanced　oxidation　process　for　environmental　remediation.