Process for preparing feed protein powder

The invention belongs to the technical field of feed processing, and particularly relates to a process for preparing feed protein powder. The process solves the technical problems of poor quality of the protein feed, low and incomplete nutritional components, difficult absorption, complex processing technique, high processing cost and the like in the prior art. The preparing process comprises the following steps of: A, acid hydrolysis; B, purification; C, drying; and D, mixing. Compared with the prior art, the process for preparing the feed protein powder has the advantages that: 1, the process has simple steps, good product quality and low production cost; and 2, the nutritional components are high and complete, and the original macromolecular components which are not easily absorbed are decomposed into small molecular components which can be easily absorbed so as to facilitate the growth of animals.