This paper introduces the method for quick determination Si element in siliconeisen used of silicon molybdenum blues photometry, taking plastic cup to replace platinum dish and using of nitric acid and hydrofluoric acid to solve sample 介绍了以塑料烧杯代替铂金皿,用硝酸、氢氟酸溶解试样,以硅钼蓝光度法快速测定硅铁中硅元素的试验方法和试验结果