The　ordered　mesoporous　carbons　were　synthesized　directly　by　the　carbonization　of　in-situ　sulfuric-acid-treated　P123　triblock/silica　nanocomposites,　which　were　prepared　from　the　combination　of　sol-gel　polymerization　and　evaporation　induced　self-assembly　and　subsequent　silica　removal.　The　influence　of　carbonization　temperature　on　the　pore　properties　of　nanocomposites　and　mesoporous　carbons　was　discussed.　The　samples　were　characterized　by　field　emission　scanning　electron　microscopy　(FESEM),　transmission　electron　microscopy　(TEM),　N2　adsorption-desorption,　and　thermogravimetric　analysis　(TGA).　These　analyses　reveal　that　the　carbon/silica　nanocomposites　have　hexagonal　ordered　structure.　With　the　increasing　of　carbonization　temperature,　the　pore　size　of　nanocomposite　increased　first,　and　then　decreased;　however,　the　pore　size　of　carbon　materials　decreased　with　the　increasing　of　carbonization　temperature.　Moreover,　the　carbon　particles　without　defects　are　composed　of　the　arrays　of　carbon　nanotubes,　which　were　5-6　nm　in　diameter　and　connected　with　each　other　by　the　spacers.