Abstract: Electrochemical hydrogenation of anthracene was carried out in a divided three-electrode cell with spumous Pb as cathode and Pt as anode.The curves of current-potential and the effectiveness of hydrogenation in CH₃CN+EtOH+H₂O+Bu₄NBr,EtOH+H₂O+Bu₄NBr,DMF+H₂O+Bu₄NBr,and DMF+EtOH+H₂O+Bu₄NBr electrolysis systems were studied.It was shown that the CH3CN+EtOH+H2O+Bu4NBr system was suitable for electrochemical hydrogenation of anthracene,and the product was dihydroanthracene in these systems.Furthermore,the effects of constitutes of solvents, water content, supporting electrolyte, and temperature were investigated.The optimum conditions found are potential=-1.9V,［CH₃CN］/［EtOH］＝2/1(v/v)，［H₂O］＝5.5mol•L^-1,［Bu₄NBr］＝0.50mol•L^-1 and T=35℃.The yield of dihydroanthracene is 91.37% for six hours electrolysis in these conditions.