The invention provides a formula and preparation method for food for promoting gastrointestinal peristalsis. The food is characterized by being prepared from the raw materials in parts by weight: 20 parts of soybean flour, 25 parts of corn flour, 10 parts of yam flour, 20 parts of milk powder, 20 parts of lactalbumin powder, 0.3 part of vitamin A, 0.3 part of vitamin B, 0.4 part of vitamin C, 2 parts of glucose, 1 part of haw extract and 1 part of lycium barbarum extract. The preparation method comprises the following steps: (1) mixing food raw materials, functional additives and plant extracts; (2) drying and granulating the mixture obtained in the step (1), and sieving the dried mixture with a sieve with the pore size of 50 meshes; (3) packaging the granules at the temperature of 30 DEG C with small bags in a manner that each small bag contains 100g of granules. The food is convenient to prepare, and process flows are simple; the food is rich in nutrition, is free of additives and can be used for rapidly supplementing nutrients required by human and regulating the gastrointestinal function of human.