NOVELTY - Preparation of iron/nitrogen-doped porous carbon ball material involves dissolving small molecular monomer 2-aminopyridine in toluene, adding porous silica spheres, mixing, adding oxidant ammonium persulfate and ferric chloride, polymerizing, centrifuging, drying, obtaining brown precursor, carbonizing at 700-1000 degrees C for 1-5 hours under nitrogen atmosphere, cooling to room temperature, obtaining carbonized product, adding hydrofluoric acid to remove the template, reacting, centrifuging, washing the resultant solid with deionized water and drying at 100 degrees C for 24 hours.    USE - Preparation of iron/nitrogen-doped porous carbon ball material used as electrocatalyst for redox performance testing (claimed) in proton exchange membrane fuel cell.    ADVANTAGE - The method provides iron/nitrogen-doped porous carbon ball material having high specific surface area and large pore volume, particle size of 20-30 nm, and excellent catalytic effect by simple and economical process.    DETAILED DESCRIPTION - Preparation of iron/nitrogen-doped porous carbon ball material involves dissolving small molecular monomer 2-aminopyridine in toluene, adding porous silica spheres as template, mixing uniformly, adding oxidant ammonium persulfate and ferric chloride, polymerizing at 0-10 degrees C for 12-48 hours, maintaining the resultant mixture, centrifuging, drying at 120 degrees C for 12 hours, obtaining brown precursor, carbonizing at 700-1000 degrees C for 1-5 hours under nitrogen atmosphere, cooling to room temperature, obtaining carbonized product, adding 10-40 wt.% hydrofluoric acid to remove the template, reacting at room temperature for 5 hours, centrifuging, washing the resultant solid with deionized water to neutral and drying at 100 degrees C for 24 hours. An INDEPENDENT CLAIM is included for usage method of iron/nitrogen-doped porous carbon ball material used as catalyst for the redox electrical performance testing, which involves using three electrode system comprising platinum wire electrode as the counter electrode, 3 M silver/potassium chloride/silver chloride as reference electrode and glassy carbon electrode doped with iron/nitrogen-doped porous carbon ball material as working electrode, immersed in 0.5 M sulfuric acid solution as an electrolyte, and carrying out redox electrical performance testing.