Abstract: The CeO₂/γ-Al₂O₃ composite powder has been studied. The experimental results showed that the CeO₂ can disperse spontaneously onto the surface of γ-Al₂O₃ to for mamonolayer, and the CeO₂/γ-Al₂O₃ monolayer dispersion composite powder could be prepared by impregnating γ-Al₂O₃ in a cerium salt's solution and followed by drying and calcining the impregnated samples. The monolayer dispersion threshold of composite powder changed by the cerium salts solution, which should be 0.042g/g (γ-Al₂O₃) for the composite powder prepared from Ce(NO₃)3 solution and 0.10g/g (γ-Al₂O₃) for that prepared from Ce (Ac) solution.