The invention discloses a method for green preparing of a high-draw-ratio silver nano wire through the composite soft template process, and belongs to the technical field of noble metal nano materialpreparing. An organic diacid water solution, a polyvinyl alcohol water solution and deionized water are mixed firstly, the pH value of a mixing system is adjusted to range from 2 to 6.5, and an organic diacid-polyvinyl alcohol composite soft template mixed solution is prepared; then, a silver saline solution, a gallic acid water solution and the organic diacid-polyvinyl alcohol composite soft template mixed solution are evenly mixed, the reaction is conducted under the condition of low-speed stirring, a solid-phase reaction product is obtained, washing is conducted through an ethyl alcohol water solution, and accordingly the high-draw-ratio silver nano wire is obtained. The high-draw-ratio silver nano wire prepared through the method is high in purity and good in uniformity, the preparingmethod is simple and easy to operate, the characteristics that the yield is high, cost is low, and environment friendliness is achieved are achieved, and the obtained high-draw-ratio silver nano wirehas good antimicrobial activity.