The invention relates to multipurpose maize enriched flour and a production method thereof, belonging to food processing technology. The production method comprises the steps of performing winnowing, magnetic separation, spraying washing on flowing water to remove impurities, and carrying out nutrient ultrasonic activation induction and increment, peeling, high-shear crushing and grinding, variable-frequency microwave drying, sterilization, high-frequency vibration ultrafine crushing and other treatment to produce multipurpose maize flour which is rich in vitamin, amino acid and soluble saccharides, amylase and other nutrients and bioactive constituents, and the multipurpose maize enriched flour product has thick maize fragrance, and can be used as raw materials for processing cooked wheaten food such as bread, biscuits, steamed bread, dumplings, noodles, steamed cake and the like. The production conditions of the product are mild to well maintain the natural nutrients therein; no pollution and harmful substances are generated in the production process, any chemical and artificial synthesis additives are not used, so that the multipurpose maize enriched flour is safe to eat.