A series of attapulgite (ATP) supported perovskite-type La1−xCexFeO3 (x = 0–0.5) nanocomposites were synthesized by a facile sol–gel method. The samples were characterized by X-ray diffraction, Transmission electron microscope, Ultraviolet–visible spectroscopy and Fourier-transform infrared spectroscopy. The photoactivity of the La1−xCexFeO3/ATP was evaluated via catalytic reduction of NOx with NH3 at low-temperature under visible light irradiation. The impact of the doping fraction of Ce on the NOx conversion was investigated. Results show that ATP provides a high surface area facilitating the dispersion of small nanoparticles as well as the gas adsorption, while incorporation of an appropriate amount of Ce leads to the formation of coherent heterostructure La1−xCexFeO3/CeO2 which benefits the separation of electron–holes. The highest conversion rate of NO reaches 80% at low temperature when the doping amount is 0.3.