High-strength hot-dip zinc plated steel material having excellent plating properties and method for preparing same

A method for preparing a high-strength hot-dip zinc plated steel material, comprising:

• preparing a base steel including 0.05 to 0.25 wt % of C, 0.01 to 1.6 wt % of Si, 0.5 to 3.1 wt % of Mn, 0.001 to 0.10 wt % of P, 0.01 to 0.8 wt % of Al, 0.001 to 0.03 wt % of N, with a remainder of Fe and unavoidable impurities;
• annealing the base steel at a temperature of 760° C. to 850° C. under the condition of a dew point temperature of −60° C. to −10° C.;
• and
• immersing the annealed base steel in a Zn—Al—Mg zinc plating bath and plating to obtain a high-strength hot-dip zinc plated steel material having a Zn—Al—Mg alloy plating layer comprising, by weight percent, 0.2% to 15% of Al, 0.5% to 3.5% of Mg, with a remainder of Zn and unavoidable impurities, and an interfacial layer formed at the interface of the base steel and the Zn—Al—Mg alloy plating layer, wherein a sum of contents of Al and Fe contained in the interfacial layer is 50 wt % or higher excluding 100 wt %, and wherein a rate of occupied surface area of the interfacial layer is 70% or higher including 100%.