The invention discloses a method for preparing nanometer grade magnetic catalytic materials for catalytic wet oxidation treatment on antibiotic production wastewater. The method includes dropwise adding ammonium chloride solution into heavy metal mixed solution; carrying out reaction and then adding nanometer zeolite and fly ash magnetic beads into reaction products to obtain mixtures; allowing the mixtures to stand still; transferring the mixtures into blast drying ovens and drying the mixtures; washing the mixtures by the aid of methanol and deionized water and removing chlorine ions; dryingthe mixtures until the weights of the mixtures are constant; calcining the mixtures in muffle furnaces to obtain the nanometer grade magnetic catalytic materials. The method has the advantages that antibiotic wastewater management can be effectively promoted by the nanometer grade magnetic catalytic materials, the antibiotic production wastewater treatment efficiency can be improved and reaches 86% at least as compared with wet oxidation reaction procedures without added catalysts, antibiotic wastewater treatment effects further can be improved by more than 40% as compared with the same typesof heavy metal catalysts of catalysts synthesized by other carriers, the separation characteristics of catalysts can be effectively improved, the catalysts can be separated by the aid of common magnets, and the nanometer grade magnetic catalytic materials can be widely applied to antibiotic wastewater pollution treatment.