Sm2Fe17Nx　sintered　magnet　was　fabricated　by　spark　plasma　sintering　(SPS)　technique.　The　effects　of　sintering　pressure,　sintering　temperature　and　rapid　heating　on　the　magnetic　properties　of　Sm2Fe17Nx　magnet　were　investigated.　The　results　show　that　the　densities　of　the　magnets　are　obviously　improved　with　the　increase　of　sintering　pressure,　but　the　coercivity　of　the　magnets　drop　distinctly　since　Sm2Fe17Nx　decomposed　into　SmN,　α-Fe　and　N2.　It　is　founded　that　the　coercivity　of　the　magnets　also　decrease　rapidly　when　sintering　temperature　is　above　200°C　under　1GPa　sintering　pressure,　which　indicates　that　high　pressure　promote　the　decomposition　of　Sm2Fe17Nx　at　low　temperature.　And　the　decomposition　of　Sm2Fe17Nx　can　not　be　effectively　restrained　by　using　rapid　sintering　at　450°C/min.