High corrosion resistance Zn-Fe alloy coatings were electroplated onto NdFeB sintered magnet from a weak acid chloride solution. The influences of the main electroplating technological parameters on Fe content in the coating were investigated to optimize the process conditions. Meanwhile, the corrosion resistance and its mechanism were investigated by NSS, SEM and electrochemical tests. The result shows that the optimized Zn-Fe alloy (Fe content 0.92%) coated NdFeB can stand for 196 h against neutral 3.5wt% NaCl salt spray without any white rust. The function of the coating for NdFeB substrate is anodic protection. The coating with dense crystal can fill intrinsic defects of NdFeB substrate and provide favorable conditions for getting compact passivation film. The better corrosion resistance is attributed to the less surface defects and high electric resistance.