The invention pertains to the field of feed formula design and feed processing technique, specifically relating to an all-wheat type growing and fattening pig diet and its processing technique. The inventive all-wheat type growing and fattening pig diet is composed of the following components in weight percent: 50-70 parts of all-wheat, 4-10 parts of rice bran, 10-25 parts of bean pulp, 1-5 parts of peanut meal, 0.2-1.0 parts of composite vitamins, 0.2-1.0 parts of composite trace elements, and 0.1-0.4 parts of wheat-type-specific enzyme. The processing technique adds a maturing step between the modulation step and the granulation step. By adoption of the growing and fattening pig diet, the invention has low feed cost, faster fatten pigs growth rate, shortened breeding cycle, improved fatten pigs growing production efficiency, greatly improved pig shape and carcass quality, good palatability of the all-wheat type pig diet, good pork quality (stearin meat); and the invention solves the feed resource tensioning problem to some extent.