Preparation method and application of pure natural anti-diarrhea growth-promoting vinasse protein powder

The invention discloses a preparation method and application of pure natural anti-diarrhea growth-promoting vinasse protein powder, and the method comprises the following steps: taking fresh Maotai-flavor liquor vinasse in Maotai-flavor liquor origin and main production areas (northern latitude 27 degrees 51 ', east longitude 106 degrees 22 ', altitude 415 m) as a raw material; beta-glucan is greater than or equal to 3.00%, mannan oligosaccharide is greater than or equal to 6.00%, total flavonoids (in terms of rutin) are greater than or equal to 2000ug/g, and total polyphenols (in terms of gallic acid) are greater than or equal to 2000ug/g in absolute dry matters, the vinasse is treated by a fluidized bed and a rotary flash drying process to promote dispersion of vinasse materials and prevent caking and coking, so that the nutritional value of the vinasse is preserved to the maximum extent, the moisture is reduced to 20-30% from the initial 55-65%, and then is reduced to 13% or below, and the water content of