The invention relates to the field of cigarette filters, in particular to a cigarette filter containing a TiO2 aquo-complex nanotube and TiO2 nanometer powder. The cigarette filter contains an adsorption filtration layer, wherein the adsorption filtration layer is formed by cellulose acetate fiber, the TiO2 aquo-complex nanotub, and the TiO2 nanometer powder. According to the cigarette filter containing the ultralong TiO2 aquo-complex nanotube and the TiO2 nanometer powder, the strong capacity of the TiO2 aquo-complex nanotub and the TiO2 nanometer powder on adsorbing ammonia is creatively utilized, the ultralong TiO2 aquo-complex nanotube can be firmly interweaved and mixed with the cellulose acetate fiber, and the TiO2 nanometer powder is filled in the ultralong TiO2 aquo-complex nanotube, so that the defects that in the prior art, the degradation of ammonia and other components in main stream smoke of a cigarette is not obvious, and adsorbing agent is not easily interweaved and mixed with the cellulose acetate fiber are solved.