The invention discloses a multi-element alloy zinc-impregnation method. The multi-element alloy zinc-impregnation method comprises decontamination rust-removal treatment for a metal part and a zinc-impregnation method for a metal part as well as discharge after the zinc-impregnation is completed. The multi-element alloy zinc-impregnation method is characterized by comprising the following steps: putting the metal part, a primary penetrating agent, an auxiliary penetrating agent and an anti-bonding agent into a vacuum zinc-impregnation tank, performing vacuum-pumping after sealing until the vacuum degree in the vacuum tank is not lower than 98%; and then, heating to 470-490 DEG C, preserving the heat for 120-240 minutes, cooling to 40-60 DEG C and discharging. The metal part impregnation layer produced by the method disclosed by the invention is relatively high in hardness, relatively strong in wear resistance, greatly improved in extensibility and toughness, good in smoothness and attractive; the coating is not prone to have cracks and peel off, and is especially suitable for being used under a high-acidity (alkalinity) soil application environment. The multi-element alloy zinc-impregnation method can be used for solving the problem that the service life of the grounding net is shortened as the zinc layer has cracks and is peeled off after the grounding net galvanized wire rod is transported and stretched on the spot.