By using the method of electrolysis, an extraction of pyrolusite can be achieved, followed by an investigation of the effects of the amount of ferric sulfate, amount of sulfuric acid, leaching time, current density, ratio of liquid and solid, temperature and stirring rate on the leaching rate. With the mole ratio of ferrous sulfate to pyrolusite being 1:2, the concentration of sulfuric acid being 0.1mol/L, the leaching time being 2 h, the current density being 400 A/m2, the liquid-solid ratio being 7:1, the temperature being 80 ℃, and the stirring rate being 300 r/min, the leaching rate of manganese reaches above 95% under these optimum conditions.