The　composition　and　structure　evolution　of　carbon　nanotube(CNT)　/　silica　xerogel　composites　during　the　process　of　laser　irradiation　were　traced　by　infrared(IR)　spectra,　Raman　spectra,　transmission　electronic　microscope(TEM)　and　pore　structure　analysis.　The　results　of　IR　and　Raman　spectra　show　that　during　the　process　of　laser　irradiation　the　compositions　of　the　composites　do　not　make　any　noteworthy　changes,　while　the　matrix　silica　network　becomes　perfect　and　the　doped　CNTs　become　more　graphitized.　TEM　images　and　pore　structure　analysis　show　that　the　SiO2　granules　and　the　corresponding　pore　size　increase　after　laser　irradiation.