For　a　better　application　of　Hollow　Cathode　Discharge　(HCD)　to　powder　metallurgy　sintering,　with　the　pressed　stainless　powder　cylinder　and　parallelism　sheet　bar　as　hollow　cathodes,　the　igniting　conditions　of　HCD　and　the　effects　of　vacuum　width,　air　pressure,　voltage　and　temperature　of　hollow　cathode　have　been　studied　in　this　paper.　The　results　show　that　the　igniting　condition　of　HCD　is　the　felicitousness　combination　of　vacuum　width,　air　pressure　and　voltage.　The　current　density　of　discharge　is　related　to　the　vacuum　width,　voltage　and　air　pressure.　Under　the　condition　of　meeting　the　requirements　of　HCD　effect,　the　smaller　the　vacuum　width,　the　higher　the　pressure　of　work　gas　and　the　discharge　voltage　is,　and　the　larger　the　current　density　of　discharge　is.　The　current　density　reduces　along　with　the　temperature　of　hollow　cathode　rise.