采用循环伏安曲线和恒电流阶跃法研究了亚硫酸在硫脲浸金中的作用。亚硫酸存在下，硫脲的稳定性增大，溶液中硫脲的有效浓度增大，使金溶解活化能降低，溶解速度明显加快。亚硫酸具有电化学还原－催化硫脲浸金的作用。 Cyclic voltammetry and constant current step method were used to study the effect of sulfurous acid on thiourea leaching. In the presence of sulfurous acid, the stability of thiourea increases, the effective concentration of thiourea in the solution increases, the activation energy of gold dissolution decreases, and the dissolution rate is significantly accelerated. Sulfuric acid with electrochemical reduction - catalytic role of thiourea leaching of gold.