The invention relates to a production process of germ and corn composite nutritional powder and the product of the production process, and belongs to the technical field of food processing. The production process is characterized in that mixing corn which sprouts in stress with wheat germ which is subjected to microwave enzyme inactivation; performing extrusion and superfine grinding to prepare germ and corn meal; adding carrot meal, spirulina meal, white granulated sugar, maltodextrin and vegetable fat powder into the germ and corn meal; and sterilizing and packaging to prepare the germ and corn composite nutritional powder. The production process is simple and high in industrial degree, so that the germ resource can be further utilized, corn can be completely utilized, and the additional value of agricultural products can be increased. The germ and corn composite nutritional powder produced by the production process is good in dissolubility, fine in taste and high in nutritional value, is rich in gamma-aminobutyric acid, glutathione, octacosanol, dietary fiber and other components, has the functions of improving brain functions, calming nerves, improving sleeping, resisting oxidation, delaying senescence, improving body immunity and the like, and is an ideal health-care nutritional food, wherein the content of gamma-aminobutyric acid in the product is between 20 and 60mg/100g.