Advanced granular protein granulation technology is adopted, i.e. wheat gluten is pressed into a columnar product after proper pretreatment and even moisture return, and then dried. Nantong Lianhai Weijing Biology Co., Ltd., as a leading manufacturer of wheat gluten in China, began to develop this product in September 2010 and realized large-scale production in June 2013. The technology solves the problem that the traditional wheat gluten product is in powder form and needs a plurality of processes before being fed when being used as feed for aquatic breeding animals. When the product is used for feeding aquatic animals instead of fish meal, it has the advantages of high protein content, good absorption and digestion of aquatic animals, fast growth, fresh and tender meat quality, etc. Meanwhile, the feeding loss rate is greatly reduced, the feed utilization rate is improved, and the feeding cost is saved. The indexes of its basic products are as follows: moisture content ≤ 8%; Crude protein content (N×5.7, dry basis) ≥ 75%; Ash content (dry basis) ≤ 1.0%; Fat content (dry basis) ≤ 1.0%; Thickness: the passing rate of CB30 sieve is ≥99.5%, and that of CB36 sieve is ≥ 95%; Water absorption (dry basis) ≥160%.