The invention relates to a preparation method of a composite structure oxygen reduction electrocatalyst for a fuel cell cathode. The preparation method comprises the following steps: condensing and refluxing tetrapyridyl porphyrin, ferric trichloride hexahydrate and a DMF (Dimethyl Formamide) solvent, removing a solution by using rotary evaporation, putting residues into a culture dish, freezing, transferring a solid into a freeze dryer, and drying to obtain tetrapyridyl ferriporphyrin; adding fullerene C70 and tetrapyridyl ferriporphyrin into a toluene solution, and carrying out ultrasonic dispersion to obtain a mixed solution; adding isopropanol into the mixed solution, standing for reaction, then carrying out suction filtration and washing, and carrying out vacuum drying to obtain a composite sample precursor; and uniformly spreading the composite sample precursor in a magnetic boat, putting the magnetic boat into a quartz tube taking hydrogen-argon mixed gas as a protective atmosphere, keeping the temperature at 700-900 DEG C for 2-4 hours, naturally cooling to room temperature, and grinding to obtain the composite structure oxygen reduction electrocatalyst. The process is simple to operate, the selected raw materials are low in production cost, and industrial production is easy. The obtained C70 / FeTPPy composite structure is expected to become a substitute of a noble metal catalyst. And the half-wave potential can reach 0.87 V (vs.RHE).