Zinc-aluminum-magnesium alloy coating steel containing V, Ti and Nb and preparation method thereof

The invention relates to zinc-aluminum-magnesium alloy coating steel containing V, Ti and Nb and a preparation method thereof, and belongs to the technical field of ferrous metallurgy production. The invention provides a zinc-aluminum-magnesium alloy coating steel containing V, Ti and Nb. The coating comprises the following chemical components in percentage by mass: 0-5% of aluminum, 0.5-10% of magnesium, 0.01-0.50% of vanadium, 0-0.5% of titanium, 0.001-0.5% of niobium, less than or equal to 0.3% of other trace alloy elements and the balance of zinc and inevitable impurities, wherein Al/Mg is 0-1.5, the total amount of vanadium, titanium and niobium is less than or equal to 1.0%, and the other trace alloy elements are selected from at least one of silicon, calcium, manganese, lanthanum, cerium, chromium, zirconium and bismuth. The zinc-aluminum-magnesium alloy coating steel provided by the invention can meet the requirements of a user on high corrosion resistance and formability of the steel, is particularly