Zn-al-mg hot dip plated steel sheet and the manufacturing method thereof

The present invention pertains to a Zn-Al-Mg-based hot-dip plated steel sheet comprising: a steel sheet; and a hot-dip plated layer formed on the surface of the steel sheet. The hot-dip plated layer contains predetermined chemical components and a predetermined metallic microstructure. The surface of the hot-dip plated layer is composed of a first region and a second region, wherein the first region is arranged to have the shape of any one among a straight line, a curve line, a figure, a number, a symbol, and a character, or a combination of two or more thereof, and the first region and the second region satisfy at least one of (a) or (b) below. (a) The first region is a region in which the proportion of Al phase exposed on the surface is less than 30 area%, and the second region is a region in which the proportion of Al phase exposed on the surface is at least 30 area%. (b) The first region has a surface roughness Ra of at least 1 nm and less than 10 nm, and the second region has a surface roughness Ra of at