The invention belongs to the technical field of affinal-drug-and-diet formulas and new-resource foods, and particularly provides a medical formula food, a special medical formula food or a non-special medical formula food for chronic gastritic patients. The formula is designed according to the requirement in "National Food Safety Standard General Rules on Formula Food for Special Medical Use". With consideration of the body characters of chronic gastritic patients, various "affinal-drug-and-diet" traditional Chinese medicines are combined reasonably according to traditional Chinese medicine essential principles, and a plurality of affinal-drug-and-diet traditional Chinese medicine extract essences which are extracted through a pre-hydrolysis SBE technology, various micro-capsulated probiotics, oligopeptides extracted through bio-enzymolysis, prebiotics, amino acids, carbohydrates, grease having health-caring functions, various vitamins and minerals are all mixed together and are subjected to other processes to obtain the medical formula food. The medical formula food can be used for satisfying nutrition requirement of chronic gastritic patients as a single nutritional source, and has the effects of fortifying spleen and warming stomach, promoting digestion and increasing appetite, dispelling and draining middle energizer, clearing heat and harmonizing stomach, dispelling liver and regulating qi, fortifying spleen and soothing stomach, fortifying spleen to dispel dampness and enhancing body immunity.