Nd-Fe-B　sintered　magnet　sludge　wastes　are　one　kind　of　typical　commodity　of　recyclable　rare-earth　permanent　magnet　resources,　and　recycling　such　kind　of　wastes　with　economical　and　environmentally　friendly　techniques　is　crucial　to　the　sustainable　rare-earth　industry.　However,　the　current　multistage　wet　process　recycling　technique　for　the　sludge　wastes　involves　high　fabrication　cost,　excessive　energy　consumption,　and　heavy　environmental　burden.　Therefore,　short-process　recycling　techniques　for　Nd-Fe-B　sintered　magnet　wastes　have　drawn　increasing　attention　in　the　past　decades.　In　this　paper,　we　review　recent　efforts　into　short-process　recycling　Nd-Fe-B　sintered　magnet　sludge　wastes　with　emphasis　on　in-situ　recycling　techniques.0　2023　Published　by　Elsevier　B.V.　on　behalf　of　Chinese　Society　of　Rare　Earths.