A　BaSnO3　sample　loaded　with　CdS　quantum　dots　(CdS　QDs/BaSnO3)　was　prepared　by　an　electrostatic　selfassembly　method.　The　obtained　CdS　QDs/BaSnO3　nanocomposites　exhibited　an　efficient　visible　light　utilization　and　photocatalytic　NO　oxidation　activity.　The　experimental　results　revealed　that　the　loading　of　CdS　QDs　tremendously　improved　the　light　absorption　range　and　the　separation　efficiency　of　photogenerated　electron-hole　pairs.　In-situ　DRIFTS　tests　demonstrated　that　the　introduced　Cd2+　could　provide　new　active　sites　for　NO　adsorption　and　activation.　Simultaneously,　the　EPR　test　showed　that　the　introduction　of　CdS　QDs　induced　the　generation　of　.O2-,　which　was　conducive　to　promoting　the　deep　oxidation　of　NO.　This　study　provides　a　facile　and　effective　synthesis　method　and　strategy　for　improving　the　photocatalytic　NO　removal　efficiency　while　significantly　suppressing　the　NO2　concentration.