The oxide anode of Ru-Ir-Ti / Ti were prepared by pechini method by the different amount of citric acid. The microstructure , distribution of element and phase structure of the anode coating were studied with SEM, XRD. The chlorine evolution electric catalytic activity and stability of the anode were studied by the chlorine evolution polarization curves, cyclic voltammetry and accelerated life test . The results show that the amount of citric acid has great effects on the surface morphology of the Ru-Ir-Ti / Ti oxide anode coating; With the increase of the addition amount of citric acid, accelerated life life gradually reduced, anode chlorine evolution activity first increases, then decreases.