Phosphate in wheat flour products, which was pretreated by microwave digestion technique, was determined by ion chromatography equipped with a conductivity detector. The chromatographic column was IonPac AS19（4×250 mm）and the mobile phase was 35 mmol/L KOH solution at a flow rate of 1.0 mL/min. The result showed that the recovery rate for this method was 97.0%~115.0% and the relative standard deviation was less than 0.5% .The linear regression coefficientwas higher than 0.999 within the concentration range of 1.0〖KG-*3〗~50.0 mg/L. As a simple and rapid testing, this method showed satisfied accuracy and was suitable for the determination of phosphate in wheat flour products.