Titania nanotube (TiNTs) is a new one-dimensional nano material, which has attracted much attention due to its large specific surface area and unique hollow tubular structure. The synthesis mechanism, influencing factors, advantages and disadvantages of preparation methods are reported. The promotional effect of TiNTs as the carrier of SCR (selective catalytic reduction) catalyst on the adsorption performance, oxidation-reduction performance and anti-poisoning performance of SCR catalyst as well as the effect mechanism was discussed. Finally, the main research direction of TiNTs as the catalyst carrier is to improve denitration activity at low temperature and anti-poisoning performance of catalysts by regulating the morphology and surface modification of TiNTs and coupling with the active components of catalysts.