The invention discloses a synthetic method for flower type silver micron particles. The method comprises the steps that firstly, ascorbic acid solid powder and silver nitrate crystals are obtained through weighing and dissolved in deionized water respectively for standby application; a prepared ascorbic acid solution is added into a silver nitrate solution, and the molar ratio of ascorbic acid and silver nitrate is 0.8-1.2:1; as long as the ascorbic acid solution is added, stainless steel sheets which are cleaned completely are added into the mixed solution; reaction materials are magnetically stirred for 180 min-360 min after the stainless steel sheets are added, and reaction is completed; the stainless steel sheets in the materials are taken out after the reaction is completed and then separated centrifugally, and after reciprocation washing and drying, the flower type silver micron particles are obtained. According to the preparation method, the shapes of products can be controlled, operation is simple, conditions are mild, and the repeatability is good.