M-TaC multilayer coatings were prepared on the surface of ZK60 magnesium alloy with magnetron sputtering technology. The layer’s microstructure, adhesion performance, and corrosion resistance were investigated with TaC single-layer coating as the control. The results indicated the coatings exhibiting a porous columnar structure and hydrophilicity, which could significantly improve the corrosion resistance of ZK60 magnesium alloy. Compared to TaC single-layer coatings, M-TaC multilayer coatings showed increased surface roughness, decreased hydrophilicity, improved adhesion (about 60%), and enhanced corrosion resistance (with a corrosion current density of 2.944 μA/cm2 lower).