Studied　was　the　processing　technique　of　micro-pore　silicon　carbide　which　respectively　took　sawdust,　carbon　powder　and　petroleum　coke　powder　as　pore-forming　material.　The　relation　between　the　processing　technique　and　properties　of　this　material　was　studied.　The　results　show　that　combined　with　mullite　silicon　carbide　serves　as　matrix　of　materials.　The　bending　strength　and　porosity　of　this　material　would　be　decreased　and　increased　respectively　with　the　increasing　of　pore-forming　material　and　the　decreasing　of　forming　pressure.　The　bending　strength　could　be　increased,　by　increasing　the　oxide　or　using　finer　silicon　carbide　particle.　Silicon　carbide　filtrating　material　that　can　meet　the　demands　was　prepared　by　optimizing　the　technique.