Wire rods having various sectional shape are generally used directly in various applications. In the shape rolling, a couple of grooved rollers are used and the groove match the sectional shape of the wire rod. In this 2-roll system, a couple of rollers must be changed whenever the section profile of the wire rod is changed, and frequent change of roller is a cause of increasing production cost. We developed a 4-roll wire rolling mill that reduce the disadvantage of 2-roll rolling, at the same time improving quality of the wire rods and reducing production costs. The present work is focused on the development of a high-precision 4-roll wire rolling mill for various section shape wire rods.