Anodic coatings of the oxides of Ru-Ir-Ti with different layer numbers were prepared by a pyrolysis method. The anodic coatings’ electrochemical characteristics were studied by electrochemical methods. The surface topography and the microstructure of the coatings were also studied. The results show that when the Ru-Ir-Ti oxide coating is coated with 30 layers (15.55 μm), it has better adhesive force and better catalytic selectivity. Meanwhile, the coating’s chlorine evolution potential, oxygen evolution potential and current efficiency are 1.02 V, 1.52 V and 94.5%, respectively. At the same time, the coating’s cyclic voltammetry charge is up to 35 mC/cm2 and its accelerated durability is about 525 h. When the coating layer number reaches up to 40 (22.6 μm), the anodic coating has rough surface and poor binding force and the cracks on the coating surface become deeper and wider