Abstract:Extraction process of Qinzhouhuang millet polysaccharides was investigated using the method of ul－ trasound-assisted alkali extraction method. The effects of alkali concentration， ultrasonic power， liquid-solid ratio and ultrasonic time on the yield of polysaccharides from Qinzhouhuang millet were surveyed by single fac－ tor experiment. The results showed that extracting rate of the polysaccharides was effected by solid ratio， ultra－ sonic time， ultrasonic power and alkali concentration successively. The optimum technological condition com－ bination was alkali concentration with 0.8 mol/L， ultrasonic power with 97.5 W， ultrasonic time with 15 min， and liquid-solid ratio with 30 ∶ 1 （mL/g）. Under this optimized condition， the extracting rate of the polysaccha－ rides from Qinzhouhuang millet was 70.29 %.