Zinc powder-based anodes encounter significant challenges,including severe side-reactions and nonuniform Zn plating-stripping processes.These issues lead to poor reversibility and low zinc utilization,which substantially impede their practical applications.Herein,we fabricated a multifunctional carbonyl-containing zinc metharcylate(ZMA)layer on the surface of three-dimensional(3D)zinc powder anode through in-situ modification.The ZMA layer with high electronegativity and highly nucleophilic carbonyl group assists the de-solvation process,which is conducive to the Zn^(2+)transport and homogenization of the ionic flux.In addition,the hydrophobic carbon chains in ZMA work as a protective layer to reduce the Zn powder direct contact with free-water and significantly improving side-reactions resistance.Finally,through the synergistic effect of ZMA and 3D Zn structure,the prepared electrode could cycle stably at 20 mA cm^(-2)/20 mAh cm^(-2) for 1153 h(depth of discharge:38.10%).The stable 3D Zn-MnO_(2) battery with a high capacity retention(84.2%over 500 cycles)is also demonstrated.