The invention discloses a coarse cereal flour. The coarse cereal flour is prepared from the following raw materials: 60 to 70 parts of blood wheat, 20 to 30 parts of buckwheat, 20 to 30 parts of oat, 10 to 15 parts of wheat bran, 30 to 35 parts of sweet potato, 20 to 25 parts of konjak, 18 to 24 parts of Chinese yam, 2 to 3 parts of corn silk, 1 to 2 parts of red sage root, 1 to 2 parts of polygala root, 2 to 3 parts of acanthopanax root bark, 2 to 3 parts of ginkgo leaf, 8 to 12 parts of sweet osmanthus, 15 to 20 parts of lotus seed, 12 to 15 parts of rock sugar, 12 to 16 parts of apple peel, 20 to 25 parts of mushroom, 18 to 22 parts of sea-tangle, 1 to 2 parts of a food additive and a proper amount of water. According to the invention, coarse cereals like blood wheat, buckwheat, oat and wheat bran are used as main raw materials, so the coarse cereal flour is capable of reducing blood pressure and blood fat, preventing aging, promoting digestion, fostering beauty, nourishing skin, improving disease resistance, helping sleeping, etc.; additionally added sweet potato can invigorate the spleen and the stomach, tonify deficiency, benefit energy, eliminate swelling and toxins and foster beauty; konjak has a plurality of functions like reduction of blood sugar, blood fat and blood pressure, detoxification, fostering of beauty, dredging of veins, fat reduction and appetite promotion; Chinese yam is capable of invigorating the spleen and the stomach, benefiting the lung and the kidney and supplementing vacuity; and apple peel can foster beauty, nourish skin, prevent aging, prevent and treat cardiovascular diseases, etc.