The　sol-gel　method　is　proposed　for　the　preparation　of　a　binary　carbonaceous　silicon　xerogel　by　using　tetraethoxysilane　(TEOS)　and　saccharose　as　the　raw　materials,　which　the　excess　carbon　source　is　used　as　pore　former.　A　new　kind　of　bimodal　mesoporous　silicon　carbide　was　synthesized　via　a　carbothermal　reduction　reaction　of　carbonaceous　silicon　xerogel　at　1500°C　in　an　argon　flow.　The　purified　SiC　sample　was　characterized　by　XRD,　SEM,　TEM　and　N2　porosimeter.　The　results　show　that　the　obtained　SiC　has　the　morphology　of　thorn　sphere　(TS).　The　TS　SiC　sample　possesses　a　bimodal　pore　structure　consisting　of　framework　mesoporous　of　2-6　nm　and　textural　mesoporous　ranging　over　6-40　nm,　which　has　a　surface　area　of　113　m2/g　and　a　pore　volume　of　0.38　m3/g.