The invention relates to treatment of aryl halide organic pollutants, in particular to a method for degrading the aryl halide organic pollutants. An active ingredient spinel of a catalyst has the chemical general formula of AB2O4, wherein A is one or two of Mg2+, Ni2+, Ba2+, Zn2+, Cu2+, Ca2+ and Fe2+; and B is Al3+ or Fe3+. A method for preparing the catalyst comprises the following steps of: synthesizing hydrotalcite-like compounds by using a coprecipitation method; and filtering and drying, and roasting at the temperature of between 400 and 900 DEG C. The prepared catalyst is future ground and mixed with aryl halides-containing pollutants, or further processed and formed and put in an aryl halides-containing environment to realize catalytic degradation at the temperature of between 200 and 450 DEG C. The method has the advantages of low cost, simple equipment, low energy consumption, high efficiency and the like, and the production and using processes of the catalyst have the advantage of good environmental protection.