Abstract:Samples of food and food additives were pretreated with microware digestion method.Nitric acid-Hydrogen peroxide/ Nitric acid-Hydrochloric acid-Hydrofluoric acid system was used respectively in the microware digestion method.Then samples were detected by the inductively coupled plasma emission spectrometry.Above-mentioned method was a new detection method established for insoluble silicon in food and food additives.In this method，the lowest detection limit of insoluble silicon in silicon was 0.24 mg/kg，the recovery of standard addition was 91.0 %-106.2 %.Because of the low detection limit，accurate analysis，effectively eliminating the interference of complex matrix and deducting the effect of the background，this method can be used as detection method for insoluble silicon in food and food additives.