NOVELTY - Sulfuric acid and water are added to nitrogen-boron-co-doped conductive carbon material, stirred at 50-80 degrees C for 5-8 hours, cooled to room temperature, filtered, washed with distilled water for 3-5 times, and vacuum-dried at 40-100 degrees C for 1-4 hours. Nitrogen-boron-co-doped conductive carbon material is added to furnace, heated at 500-900 degrees C and heating rate of 10-20 degrees C/minute for 0.5-2 hours under protection of argon or nitrogen, and cooled to room temperature, to obtain boron-nitrogen-co-doped conductive carbon-based catalyst.    USE - Preparation of boron-nitrogen-co-doped conductive carbon-based catalyst used for fuel cell.    ADVANTAGE - The method enables economical preparation of boron-nitrogen-co-doped conductive carbon-based catalyst with high yield and excellent oxygen-reduction activity and stability under acid and alkaline condition by simple method, with low equipment requirement.    DETAILED DESCRIPTION - Conductive carbon is added to dilute sulfuric acid and soaked for 6-48 hours. The mixture is filtered and washed with distilled water for 3-5 times. Washed conductive carbon is vacuum-dried at 40-100 degrees C for 1-4 hours, to obtain pretreated conductive carbon. 50-74 mass% Pretreated conductive carbon, 10-30 mass% nitrogen source, 6-12 mass% boron source and 10-20 mass% activator are added to ball mill, and mechanical-milled for 30-120 minutes, to obtain mixed powder. The mixed powder is placed in an oven, heated at 300 degrees C and heating rate of 10-20 degrees C/minute under argon or nitrogen atmosphere for 10-60 minutes, heated at 500-1100 degrees C and heating rate of 5-10 degrees C/minute, heat-treated at 500-1100 degrees C for 1-3 hours and cooled to room temperature, to obtain nitrogen-boron-co-doped conductive carbon material. Sulfuric acid and water are added to nitrogen-boron-co-doped conductive carbon material, stirred at 50-80 degrees C for 5-8 hours, cooled to room temperature, filtered, washed with distilled water for 3-5 times, and vacuum-dried at 40-100 degrees C for 1-4 hours. Nitrogen-boron-co-doped conductive carbon material is added to furnace, heated at 500-900 degrees C and heating rate of 10-20 degrees C/minute for 0.5-2 hours under protection of argon or nitrogen, and cooled to room temperature, to obtain boron-nitrogen-co-doped conductive carbon-based catalyst.