Abstract: TiO₂/Cu₂O composite photocatalysts were prepared by hydration hydrazine reduction method and loaded on activated carbon fiber (ACF). The SEM, XPS, BET and XRD were used to analyze the property changes and reaction behaviors of catalysts. The NO and SO₂ removal efficiencies of the catalysts were also investigated. The results show that the pore size of ACF is decreased after modified by TiO₂/Cu₂O. The surface functional groups including graphite carbon and carbonyl group are increased, which enhance the NO and SO₂ adsorption capacity of ACF. The highest desulfurization and denitrification efficiency are 90% and 60% at 40℃ under visible-light.