Method for extracting zein from corn gluten meal

The invention relates to a production method for extracting zein, which comprises the following steps: adding ethanol into corn gluten meal, carrying out ultrasonic extraction, carrying out centrifugal separation to obtain a decolorized and degreased filter cake, adding ethanol into the filter cake, carrying out ultrasonic extraction, precipitating protein, and drying to obtain a zein finished product. According to the method, the raw material is the corn gluten meal which is wide in source, ethanol is used as a single extracting agent, no other organic reagent is used, and the ultrasonic extraction technology is adopted, so that the problems of low extraction rate, long extraction time and relatively high energy consumption of a common heating method are solved. The method has the advantages of high yield, high purity, short extraction time, low production cost and the like, the raw materials for production are byproducts of corn processing, the additional value of the corn gluten meal is remarkably improved