Succinic acid is an intermediary in the synthesis of various complex organic compounds and also an important material for manufacturing medicines, which has wide applications in systhesis of plastics, rubbers, medicines, food and dope and so on. Titanium anode of Ir-Ta coating system, used for the electrolytic synthesis of succinic acid, has a long service life in acid electrolyte system for their high catalytic and electrochemical stability.