Abstract: In order to improve the microhardness and corrosion resistance of Ni-W-ZrO₂ composite coating, Ni-W-ZrO₂-graphene nanosheets (GNPs) composite coating was prepared on 7075 aluminum alloy by electrodeposition method, and GNPs was used to improve the surface performance of Ni-W-ZrO₂ composite coating. Orthogonal experiment was used to optimize the experimental process conditions: the current density was 10 A/dm², the stirring speed was 250 r/min, and the temperature was 60℃. Under the optimal process conditions, ZrO₂ nanoparticles maintain 10 g/L, change the content of GNPs (1, 2, 3, 4 g/L), and seek the best GNPs addition amount of Ni-W-10 g/L ZrO₂-GNPs composite coating. The microhardness and abrasion resistance were studied by the microhardness tester and the rotating friction tester, and the microscopic characterization was carried out by SEM, EDS, XRD and AFM. The corrosion resistance of Ni-W-ZrO₂-GNPs composite coating in 3.5wt%NaCl solution was studied by electrochemical method. The results show that GNPs and ZrO₂ nanoparticles are uniformly co-deposited in the nickel-tungsten coating, and the incorporation of GNPs has a significant effect on the microscopic morphology, grain size, microhardness, friction performance and corrosion resistance of the Ni-W-ZrO₂ composite coating. When the amount of GNPs added is 3 g/L, the grain size of the Ni (W) matrix is the smallest, the microhardness (HV 942) is the highest, and the average friction coefficient (0.1981) is the smallest. When the amount of GNPs is 2 g/L, the corrosion resistance of Ni-W-ZrO₂-GNPs composite coating (Charge transfer resistance R_ct: 9532 Ω·cm²) is significantly improved compared to Ni-W-ZrO₂ composite coating (R_ct: 1766 Ω·cm²).