Ordered　mesoporous　carbon　has　the　promising　development　and　potential　in　catalysis,　because　of　its　large　amount　of　uniform　pore　size　and　high　surface　area.　In　this　paper,　ordered　mesoporous　carbon　has　been　successfully　synthesized　via　evaporation-induced　self-assembly　(EISA)　method,　using　triblock　copolymer　Pluronic　F127　as　a　soft　template,　resol　as　a　carbon　precursor　and　diatomaceous　earth　as　the　transient　scaffolds.　Diatomite　is　a　kind　of　special　biomaterial　with　3D　precision　of　tens　of　nanometers　and　of　low　price.　Diatomite　shells　not　only　maintain　the　intact　structure　of　the　ordered　mesoporous　carbon,　but　also　increase　its　aperture　diameter　and　surface　area　to　a　certain　degree,　during　the　carbonization　between　600　degrees　C　to　800　degrees　C.　When　the　samples　were　calcined　in　nitrogen,　the　features　of　diatomite　could　effectively　reduce　shrinkage　ratio　of　sample　structure,　keeping　the　precursor　fluid　firmly　adsorbed　on　the　surface　of　diatom　shells:The　resulting　materials　were　characterized　by　X-ray　diffraction,　transmission　electron　microscopy　and　N-2　adsorption-desorption,　etc.　The　results　showed　all　the　samples　had　highly　ordered　mesoporous　structure.　Under　the　support　of　diatomite,　both　of　the　specific　surface　area　(717　similar　to　773　m(2).g(-1))　and　pore　sizes　(3.9　similar　to　11.3　nm)　of　the　mesoporous　carbon　have　become　much　larger,　which　could　be　controlled　by　adjusting　the　ratio　of　diatomite　to　resol.　The　influence　of　the　diatomite　on　the　structure　of　the　mesoporous　carbon　was　discussed　in　the　paper.　Furthermore,　we　used　the　as-prepared　ordered　mesoporous　carbon　to　load　Pt　nanoparticles.　The　Pt/carbon　catalysts　were　prepared　by　microwave-assisted　heating　process　with　ethylene　glycol　as　reductant.　The　electrocatalytic　activity　of　carbon　supported　Pt　nanoparticles　was　verified　by　cyclic　voltammetry　in　CH3OH　solution.　We　found　the　carbon　materials　with　much　larger　specific　surface　areas　had　higher　electrocatalytic　activity.　When　the　ratio　of　diatomite　to　resol　was　0.5,　the　specific　surface　area　of　the　sample　was　the　largest,　and　the　corresponding　Pt/carbon　showed　the　highest　peak　current　of　methanol　oxidation.