A method for prepare a nitrogen-doped carbon microsphere/Pd composite catalyst comprises: adding carbon material into nitric acid solution, stirring, heating, heat preservation, cooling, filtering anddrying; (2) calcining the carbon material prepared in the step (1) at a temperature of 300-1000 DEG C under a protective gas atmosphere to obtain a black powder material; (3) mixing the black powdermaterial, water, ammonium sulfate, ammonium persulfate, and palladium nitrate obtained in the step (3) to prepare an aqueous solution, stirring, heating and keeping temperature, cooling, filtering, and drying. As that catalyst in the present application has high catalytic activity and good stability for oxygen reduction, the method is simple.