The　Ni-Cu-C　solid　self-lubricating　materials　were　prepared　by　melting　method　and　the　spheroidization　effect　of　rare　earth　magnesium　on　graphite　of　Ni-Cu-C　was　studied.　The　results　show　that　with　the　addition　percent　of　Cu　within　0-50%,　the　spheroidization　effect　of　0.75%　of　rare　earth　magnesium　on　the　graphite　during　crystallization　is　effective.　After　the　graphite　being　spheroidized,　its　nucleation　density　increases　and　distributes　homogeneously.　The　solution　of　Cu　improves　the　hardness　of　alloy　matrix　and　the　electrical　resistivity　of　Ni-Cu-C　alloy.　The　more　adding　of　Cu　has　the　effective　spheroidization　on　the　graphite,　but　reduces　the　content　graphite.　The　self-lubricating　properties　of　Ni-Cu-C　alloy　increase　with　the　increasing　of　graphite　content　and　spheroidization.　Through　dry　friction　and　wear　experiment　against　45#　annealed　steel　and　GCr15　bearing　steel,　it　was　found　that　the　friction　coefficient　of　the　Ni-20%Cu-3.5%C　alloy　remains　stably　as　0.12　and　0.13,　respectively.