In　this　paper,　a　visible　light-driven　polymeric　carbon　nitride　(PCN)/(Pt)/nano-spherical　MoS2　photocatalysts　was　prepared　using　a　self-assembly　method.　The　structure　of　photocatalysts　was　explored　by　FT-IR,　XPS,　XRD,　BET,　SEM　and　TEM.　Meanwhile,　the　energy　band　structure　and　electron　hole　separation　efficiency　were　also　analyzed　by　UV-Vis　and　PL　spectra.　In　addition,　the　photocatalytic　performance　of　photocatalysts　were　tested　by　photocatalytic　degradation　of　Rhodamine　B　and　photocatalytic　hydrogen　evolution.　The　results　showed　that　PCN/　2.0%MoS2　showed　the　best　photocatalytic　performance,　and　the　degradation　rate　of　Rhodamine　B　could　reach　98.39%　within　150　min.　Besides,　the　introduction　of　Pt　nanoparticles　significantly　improved　the　photocatalytic　activity.　The　degradation　rate　of　Rhodamine　B　reached　100%　within　150　min,　and　the　rate　of　photocatalytic　hydrogen　production　of　PCN/Pt/MoS2　system　was　increased　by　21.3%　over　the　PCN/2.0%MoS2　system.　The　separation　mechanism　of　electron　and　hole　is　Z-scheme　mechanism　and　the　main　active　substances　for　photo　catalytic　degradation　were　.O-2(-)　and　h(+).