The　effect　of　Al　content　on　the　solidifying　structures　of　Ni-Al-C　self-lubricating　material　was　studied.　The　mechanical　properties　and　tribological　performances　were　investigated.　The　results　show　that　when　Al　content　is　4.25%,　the　graphite　content　is　high,　the　eutectic　graphite　is　the　main　morphology　and　the　matrix　of　the　alloy　is　single　γ-Ni(Al)　solution.　With　the　increase　of　Al　content,　the　graphite　content　and　eutectic　graphite　of　solidifying　structures　deduce,　graphite　in　primary　phase　has　a　tendency　of　spherical　transformation.　When　Al　content　is　6.85%,　the　γ-Ni(Al)　solution　and　a　small　quantity　of　(γ　+　γ′)　eutectic　make　up　the　matrix　of　the　alloy.　When　the　Al　contents　are　8.13%-9.94%,　γ-Ni(A1)　solution　disappears,　the　solidifying　structures　of　the　alloy　are　composed　of　γ′-Ni3　Al,　(γ　+　γ′)and　graphite　phases.　When　the　Al　content　is　12.74%,　the　matrix　are　γ′-Ni3Al　and　Ni3AlC0.5　phases　with　high　hardness　observed　on　reticular　intergranular　in　the　alloy.　The　alloys　with　lower　Al　content　have　preferable　ductility,　improving　the　Al　content　is　advantage　to　improve　the　mechanical　robustness　and　wear-resisting　property　of　materials.　The　matrix　structures　of　alloy　with　8.13%A1　consist　of　(γ　+　γ′)　eutectic　phases.　The　grain　size　is　refined　obviously　and　the　comprehensive　mechanical　properties　improve　obviously.　The　wear　coefficient　and　the　wear　loss　rate　are　little.