Nd-Fe-B　permanent　magnets　with　a　small　amount　of　Al　nano-particles　doping　were　prepared　by　conventional　sintered　method.　Effect　of　Al　content　on　magnetic　property,　corrosion　resistance　and　oxidation　properties　of　the　magnets　were　studied.　Investigation　showed　that　the　coercivity　rose　gradually,　while　the　remanence　decreased　simultaneously　with　increase　of　Al　doping　amount.　Further　investigation　revealed　that　most　Al　element　diffused　into　the　main　phase　and　some　Al　element　diffused　into　the　Nd-rich　phase.　The　autoclave　test　results　showed　that　the　corrosion　rate　of　the　magnets　decreased　with　Al　content　increasing.　After　oxidation,　the　maximum　energy　product　losses　of　the　magnets　with　0.0　wt.%　and　0.2　wt.%　Al　nano-particles　doping　were　6.13%　and　3.99%,　respectively.　Therefore,　Al　nano-particles　doping　was　a　promising　way　to　enhance　the　coercivity　and　corrosion　resistance　of　sintered　Nd-Fe-B　magnet.