The TiO 2 membrane immobilized on active carbon prepared by sol gel method was studied. The results of SEM, EDS and XRD indicated that the TiO 2 membrane was uniform and continuous, and the adsorbability of the composite photocatalyst was partly kept. The membrane was used to degrade the methyl orange solution. The results showed that the TiO 2 membrane has higher photoactivity than the TiO 2 powder photocatalyst.