Hydrogen　treatment　technology　is　developed　to　recycle　the　waste　Nd-Fe-B　sintered　magnets　in　the　way　of　short　route,　low　cost,　and　high　efficiency.　In　present　study,　effect　of　hydrogen　pressure　on　hydrogen　decrepitation　(HD)　process　of　sintered　Nd-Fe-B　strip　casting　flakes　(SC)　and　waste　sintered　magnets　(SM)　was　systematically　studied.　Both　SC　and　SM　show　the　approximate　HD　process,　which　accelerates　with　increasing　pressure.　The　surface　activation　process　accelerates　with　increasing　pressure,　and　almost　disappears　when　the　initial　hydrogen　pressure　reaches　to　6　MPa.　The　hydrogen　content　of　SM　is　lower　than　SC,　and　increases　with　increasing　pressure.　For　the　SM,　blasting　power　of　HD　process　decreases　with　the　increase　of　the　initial　hydrogen　pressure.　It　provides　beneficial　reference　for　recycling　waste　Nd-Fe-B　sintered　magnets.