Porous　carbon　and　porous　silicon　carbide　with　homogenous　microstructure　are　prepared　from　cotton　linter　and　phenolic　resin　through　mold-stacking,　solidification,　carbonization　and　liquid　Si　infiltration　process.　SEM　observation　reveals　that　the　irregular　interconnected　pores　of　carbon　preparation　were　originated　from　the　random　arrangement　of　cotton　linter　fiber　and　different　carbonization　shrinkage.　After　the　liquid　Si　infiltration　process,　the　porous　carbon　was　converted　into　dense　SiC/Si　composites.　The　porous　SiC　was　formed　during　the　Si-removing　process　at　higher　temperature.　The　result　shows　that　open　porosity　of　porous　silicon　carbide　increases　as　Si-removing　time　increase,　while　the　bending　strength　and　the　fracture　toughness　decrease.　Crown　Copyright　(C)　2010　Published　by　Elsevier　B.V.　All　rights　reserved.