The　improvement　of　corrosion　resistance　for　sintered　Nd-Fe-B　magnets　is　usually　focused　on　the　modification　of　grain　boundary　phase.　The　main　phase　is　similarly　a　key　point　to　enhance　corrosion　resistance.　In　this　work,　a　novel　sintered　Nd-Fe-B　magnet　is　designed　with　the　addition　of　Ni　and　Cr.　This　kind　of　sintered　Nd-Ni-Fe-Cr-B　magnet　maintains　a　typical　2:14:1　tetragonal　phase,　and　the　metallurgical　behavior　of　Ni　and　Cr　is　characterized　by　the　distribution　of　Ni　in　the　grain　boundary　and　Cr　in　the　main　phase.　Accelerated　corrosion　and　electrochemical　corrosion　tests　were　conducted　to　compare　the　corrosion　resistance　of　traditional　sintered　Nd-Fe-B　magnet　and　Nd-Ni-Fe-Cr-B　magnet.　Results　show　that　sintered　Nd-Ni-Fe-Cr-B　magnet　exhibits　superior　corrosion　resistance.　It　is　found　that　the　corrosion　resistance　of　the　grain　boundary　phase　and　the　main　phase　is　simultaneously　increased.　Moreover,　the　reduced　potential　difference　between　the　grain　boundary　phase　and　the　main　phase　further　enhances　the　corrosion　resistance　of　sintered　Nd-Ni-Fe-Cr-B　magnet.　This　work　could　provide　an　insight　into　the　research　aimed　at　improving　the　corrosion　resistance　of　uncoated　sintered　Nd-Fe-B　magnets.&　COPY;　2023　The　Authors.　Published　by　Elsevier　B.V.This　is　an　open　access　article　under　the　CC　BY-NC-ND　license　(http://creativecommons.org/licenses/by-nc-nd/4.0/).