The surface of galvanized steel wire is smooth, bright and clean, without cracks, knots, burrs, scars and rust. The galvanized layer is uniform, strong adhesion, durable corrosion resistance, excellent toughness and elasticity. The tensile strength should be between 900Mpa-2200Mpa (wire diameter Φ0.2mm-Φ4.4mm). The number of twists (Φ0.5mm) should be more than 20 times, and the number of repeated bending should be more than 13 times.