Nd-Fe-B　permanent　magnets　with　a　small　amount　of　Cu　nano-particles　doping　have　been　prepared　by　conventional　sintered　method.　Effects　of　Cu　content　on　magnetic　properties,　corrosion　resistance,　and　oxidation　properties　of　the　magnets　have　been　studied.　It　shows　that　the　coercivity　rises　gradually,　while　the　remanence　decreases　simultaneously　with　increasing　Cu　doping　amount.　Microstructure　observation　reveals　that　Cu　element　enriches　mainly　the　Nd-rich　phase.　Autoclave　test　results　show　that　the　corrosion　rate　of　the　magnets　decreases　with　increasing　Cu　content.　After　oxidation,　the　maximum　energy　product　loss　of　the　magnets　with　0　and　0.2　wt%　Cu　nano-particles　doping　are　6.13%　and　0.99%,　respectively.　Therefore,　it　is　concluded　that　Cu　nano-particles　doping　is　a　promising　way　to　enhance　the　coercivity　and　corrosion　resistance　of　sintered　Nd-Fe-B　magnets.