采用电化学方法，以纯铅作阴极在固定床电化学反应器内进行了对苯二醌阴极还原制备对苯二酚的研究。得到最佳工艺条件为：电解液为１ｍｏｌ／Ｌ硫酸溶液，电解液流速ｕ＝０．３０ｍ／ｓ，反应器厚度Ｌ＝３０ｍｍ，电流Ｉ＝１０Ａ，对苯二醌浓度ｗ＝０．０４。最佳条件下的电流效率为Ｅ＝９５．９％。 Electrochemical method was used to study the preparation of hydroquinone by diphenylequinone cathode reduction using pure lead as cathode in a fixed bed electrochemical reactor. The optimum conditions were as follows: the electrolyte was 1 mol / L sulfuric acid solution, the electrolyte flow rate was 0.30 m / s, the reactor thickness was L = 30 mm, the current I was 10 A, and the concentration of p-benzoquinone was 0.04. The current efficiency under the best conditions is E = 95.9%.