Abstract: In order to eliminate an electrostatic effect due to the poor conductivity of the Y₂O₃-ZnO-Al₂O₃ coatings prepared by liquid-phase plasma electrolytic oxidation (PEO) on the surfaces of the aluminum alloy. A modification is made by the aluminum-doped zinc oxide (AZO) conductive film, deposited through the atomic layer deposition (ALD) technique in situ on the PEO coating to improve the overall conductivity. The phase composition and surface microstructure of the resulting AZO@Y₂O₃-ZnO-Al₂O₃ coatings are analyzed. Meanwhile, the conductive property including the resistivity, the carrier concentration, and the mobility, as well as thermal control and anticorrosion performance of the composite coatings obtained at different deposition temperatures are measured. It is shown that the AZO conductive film deposited on the surface of the PEO coating is uniform, continuous and dense. When the deposition temperature is 150 ℃, the AZO@Y₂O₃-ZnO-Al₂O₃ composite coating has an excellent charge conductivity with a resistivity of 1.15×10^-4 Ω·cm and the carrier concentration of 1.8×10²⁰ cm^-3. In addition, the AZO@Y₂O₃-ZnO-Al₂O₃ coating has excellent anticorrosion and thermal control properties with a solar absorptivity of 0.409 and an emissivity of 0.892, which can meet technical requirements for spacecraft thermal control coatings in space environments.