Through　modem　means　of　testing,　the　effects　of　graphite　as　an　admixture　in　cement-based　materials　are　studied　in　terms　of　the　conductive　performance,　electromagnetic　interference　(EMI)　shielding　and　mechanical　properties.　The　result　shows　that　the　conductance　is　improved　accordingly　with　the　increasing　of　graphite.　The　electromagnetic　interference　shielding　effectiveness　is　up　to　the　maximum　when　the　content　of　graphite　is　15%.　The　compressive　strength　and　flexural　strength　are　all　decreased　with　the　increasing　of　graphite.