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

A high-strength hot-dip zinc plated steel material, comprising:

• a base steel comprising, by weight percent, 0.05% to 0.25% of C, 0.01% to 1.6% of Si, 0.5% to 3.1% of Mn, 0.001% to 0.10% of P, 0.01% to 0.8% of Al, 0.001 to 0.03% of N, with a remainder of Fe and unavoidable impurities;
• 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 %,
• wherein a rate of occupied surface area of the interfacial layer is 70% or higher including 100%.