In order to improve the electrochemical corrosion and wear performance of MgF₂+MgO MAO (micro-arc oxidation) coating on AZ61 simultaneously, composite dielectric ordinal discharge thought was used to weaken the eruption of breakdown melt and hence densify the coating and enhance its performance. α (MgF₂-MgO mass ratio), microstructure, electrochemical corrosion and wear performance of coatings were investigated. The results show that the weakening effect on eruption of breakdown melt for coating with α=1.2 is obviously better than that with α=0.1 and 11.8. The thickness of inner dense layer is thickened to 3.6 μm, which is about three times as thick as that of the existing MAO coating. The impedance of outer loose layer is enhanced to 13555 Ω cm^₂, which is about 30% larger than that of α=0.1 and 11.8. Ecorr (corrosion potential) of AZ61 is increased from -1.912 to -0.455 V_SCE, Icorr (corrosion current density) is decreased from 378.6 to 0.453 (10^_-6 A/cm^₂) and the wear rate is reduced from 921 to 0.5 (10^_-5 mm^₃/N.m) by this densified micro-arc oxidation coating. This investigation provides a novel processing mode for outstanding MAO coating.