The invention relates to a production method of a high-plasticity steel wire rod for welding, comprising the steps of heating, descaling, rough rolling, pre-finish rolling, finish rolling, spinning, cold control, cooling and transportation. The strength of steel for welding is reduced and the plasticity is improved through such methods as rolling temperature control, rolling mill cooling water control, air volume control and insulation measure; and the generation of bad phenomenon in the drawing machining process is effectively improved.