Abstract: Magnesium-based anode materials have garnered significant attention in the energy storage domain owing to their high theoretical capacity and low electrochemical potential. Nevertheless, in conventional electrolyte systems, magnesium metal electrodes would dynamically generate an ion-blocking surface layer, giving rise to prominent voltage polarization, which severely constrains their practical application. In this study, ZIF-8/CNTs coatings were used to modify the anode of magnesium battery. In comparison with the unaltered magnesium battery, the voltage lag time of the ZIF-8/CNTs coating was shortened from 4 s before modification to 0.26 s, respectively, and the battery impedance was lowered by two orders of magnitude. The duration of the discharge platform was increased from 4 h before modification to 6-10 h, the anode utilization rate was more than doubled, and the specific energy density was significantly enhanced compared to before the modification. The mechanism shows that the ZIF-8/CNTs coating can limit the infiltration of corrosive substances, extend their transmission path, and offer more effective protection to the magnesium anode. The incorporation of CNTs not only boosts the battery's conductivity but also improves the electrochemical performance of the magnesium battery to a significant degree.