The invention belongs to the field of welding wires and relates to a high-strength welding wire and the purpose of the high-strength welding wire, in particular to the high-strength welding wires and application of the high-strength welding wires. The high-strength welding wire comprises important alloy elements with shrunk austenite phase fields, and the important alloy elements comprise refined steel microcosmic crystalline grains to achieve a refined crystalline strengthening effect. Therefore, after formed new alloy is used for manufacturing the high-strength welding wire, the strength is significantly improved. Chemical components of the high-strength welding wire has important influences on corrosion resistance of welded seams and shall be similar to chemical components of parent metal, in this way, welded seam metal and the parent metal are similar in chemical component, and the high-strength welding wire is generally supposed to achieve the optimal corrosion resistance. According to the scheme, the parent metal is more suitable for heavy and large-scale special vehicles.