The invention discloses a zinc-nickel alloy electroplating process for a metal surface, and relates to the technical field of electroplating, wherein the zinc-nickel alloy electroplating process comprises the steps of raw material inspection, chemical oil removal, primary water washing, electrochemical oil removal, secondary water washing, polishing, pickling, hanging, zinc-nickel alloy electroplating, quaternary water washing, drying and detection packaging. The chemical oil removal comprises the steps of treating grease on the surface of a metal component by alkali liquor with saponificationeffect to remove saponifiable grease; primary water washing comprises the steps of washing the metal component subjected to oil removal in the step S2 by flowing hot water flow. According to the zinc-nickel alloy electroplating process, based on the original process, the stirring device is additionally arranged, on one hand, the uniformity and speed of mass transfer in electroplating can be improved, on the other hand, the problem that the thickness of a plating layer is easily increased in a high-current area can be prevented; in addition, the electroplating process of the zinc-nickel alloyelectroplating process is simple, the electroplating effect of the metal surface is improved, and the electroplating cost is effectively reduced.