Due　to　its　excellent　spatiotemporal　control　and　benign　reaction　conditions,　photoelectron/energy　transfer-reversible　addition-fragmentation　chain　transfer　(PET-RAFT)　polymerization　has　received　a　lot　of　attention.　In　this　study,　TAPPY-DTDD-CMP　was　created　and　used　as　a　photocatalyst　for　non-deoxygenated　PET-RAFT　polymerization　under　visible　light　irradiation,　producing　polymethacrylates　with　adjustable　molecular　weight　and　narrow　molecular　weight　distribution.　The　effects　of　the　dosages　of　the　catalyst,　electron　sacrificial　agents,　and　different　light　sources　were　carefully　examined　in　the　polymerization　process.　To　explore　deeper　into　the　underlying　mechanism　of　the　tolerance　of　the　polymerization　to　oxygen,　oxygen　monitoring　studies　were　also　conducted.　In　addition　to　allowing　the　RAFT　process　to　effectively　use　light　and　be　light-dependent,　TAPPY-DTDD-CMP　also　demonstrates　good　controllability　and　adaptability　toward　different　monomers.　High　catalytic　efficiency,　stability,　reusability,　and　the　capacity　to　design　its　structure　at　the　atomic　level　are　further　benefits　of　TAPPY-DTDD-CMP.　The　range　of　non-deoxygenated　photocatalysts　suited　for　PET-RAFT　process　conditions　is　expanded　overall　by　TAPPY-DTDD-CMP.　A　novel　pyrene-based　heterogeneous　conjugated　microporous　polymer　photocatalyst　can　mediate　oxygen-tolerant　PET-RAFT　polymerization　without　prior　deoxygenation.