The　carbon　nanotubes-coated　cordierite　(CNTs-cordierite)　was　fabricated　by　pyrolysis　of　ethine　on　cordierite　with　iron　catalyst,　which　was　penetrated　into　the　cordierite　substrate　by　vacuum　impregnation.　The　cordierite　substrate,　carbon　naontubes,　and　CNTs-cordierite　were　characterized　by　SEM,　TEM/HREM,　BET,　and　TGA.　The　results　show　that　the　carbon　nanotubes　were　distributed　uniformly　on　the　surface　of　cordierite.　A　significant　increase　in　BET　surface　area　and　pore　volume　was　observed,　and　a　suitable　pore-size　distribution　was　obtained.　On　the　CNTs-cordierite,　carbon　nanotubes　penetrated　into　the　cordierite　substrate,　which　led　to　a　remarkable　stability　of　the　CNTs　against　ultrasound　maltreatment.　Growth　time　is　an　important　factor　for　thermostability　and　texture　of　the　sample.　The　mass　increased　but　the　purity　decreased　with　the　growth　time,　which　caused　the　exothermic　peak　shift　to　low　temperature,　and　the　corresponding　full　width　half　maximum　(FWHM)　of　the　peak　in　DTG　increased.　©　2006　CAS/DICP.