The invention discloses biscuits having the functions of invigorating the stomach and promoting the digestion and a preparation method of the biscuits. The biscuits are prepared from the following raw materials in parts by weight: 20-40 parts of maize flour, 15-25 parts of millet flour, 10-20 parts of radix puerariae powder, 5-20 parts of soybean flour, 5-15 parts of pearl barley powder, 2-6 parts of konjac refined powder, 8-18 parts of a traditional Chinese medicine extract, 5-10 parts of honey, 6-15 parts of oligosaccharide, 5-10 parts of jam, 1-4 parts of vitamin C, 1-3 parts of vitamin E, 0.5-1.5 parts of submicron grape seed powder, 3-6 parts of foaming powder, 3-7 parts of olive oil, 0.0001-0.0003 part of seeds of buchnera cruciata, and an appropriate amount of water. According to the biscuits disclosed by the invention, coarse food grains, such as the maize flour, the millet flour, the radix puerariae powder and the soybean flour, are selected as main raw materials, and are compounded with the ointment of varied Chinese herbal medicines and the jam of varied fruits, so that the biscuits have a nutrient value, have the health care functions of invigorating the stomach and promoting the digestion, and also have the efficacies of promoting the metabolism, improving the functions of intestines and the stomach, nourishing blood for tranquillization, maintaining beauty, keeping young, improving sleep and strengthening the constitutions.