Abstract: The research progress of Al2O3 in heterogeneous catalytic ozonation is reviewed. The degradation of organic compounds by catalytic ozonation and ozone alone is compared，and the important factors of successful catalytic ozonation，in terms of four key aspects，organic compounds adsorption on catalysts，pH value in liquid phase，inorganic ions and ozone decomposition are discussed. Furthermore，the existing problems in the present research are also put forward and the prospects of Al2O3 in water treatment are presented.