In　recent　years,　calcium　reduction　diffusion　has　emerged　as　a　new　method　for　in　situ　regeneration　of　Nd-Fe-B　sludge.　In　this　work,　rotation　calcium　thermal　reduction　diffusion　technology　was　used　for　the　first　time　to　solve　the　issue　of　batch　regeneration　of　Nd-Fe-B　sludge　to　a　certain　extent,　and　regenerated　Nd-Fe-B　powder　with　uniform　size　and　good　dispensability　was　prepared.　The　effect　of　rotation　rate　on　the　properties　of　regenerated　Nd-Fe-B　powder　was　mainly　studied.　We　found　that　the　magnetic　properties　of　the　regenerated　magnetic　powder　initially　increased　and　then　decreased　with　increasing　rotation　rate.　When　the　rotation　rate　was　10　rpm,　the　magnetization　of　regenerated　magnetic　powder　reached　138.22　emu/g,　which　was　10.2%　higher　than　that　of　the　purified　sludge.　The　regenerated　magnetic　powder　was　doped　with　rare　earth-rich　alloy　powder　and　high　remanence　alloy　powder　to　control　the　composition,　where　the　regenerated　sintered　magnet　was　prepared.　The　density　reached　7.51　g/cm(3)　and　the　maximum　magnetic　energy　product　reached　42.87　MGOe,　laying　a　foundation　for　the　short-process　in　situ　regeneration　of　Nd-Fe-B　sludge.