The invention relates to a Fenton-like catalyst and a preparation method of same. The Fenton-like catalyst is prepared by using sludge pyrolytic carbon as a raw material and clay as a combining agentwithout addition of an iron source and a transition metal source, wherein the iron source are iron salts and iron oxides, and the transition metal source are salts and oxides of transition metals. TheFenton-like catalyst is not less than 80% in catalytic degradation efficiency on antibiotics in H2O2 degradation wastewater in the pH range of 2-10. In the invention, on one hand, by means of the sludge pyrolytic carbon as a raw material, the Fenton-like catalyst having good performances can be produced, thus supplying a new way of high-additional-value use of the sludge pyrolytic carbon; on theother hand, in a high-temperature protective atmosphere, the Fenton-like catalyst, produced in a non-oxygen calcining manner, has high strength and is not liable to fall off into liquid. The catalystis easy to recover, can stably immobilize heavy metals, is high in environmental security, is low in cost and has great application prospect.