The invention discloses oat biscuit powder capable of lowering blood pressure. The biscuit powder is made of, by weight, 240-280 parts of oat powder, 60-70 parts of buckwheat powder, 14-18 parts of arrowroot powder, 10-15 parts of bitter gourd powder, 20-30 parts of cream powder, 30-40 parts of sunflower seeds, 8-12 parts of asparagus, 6-8 parts of lentinus edodes, 2-3 parts of corn stigma, 3-4 parts of persimmon leaves, 2-3 parts of figs, 1-2 parts of grape leaves, 2-3 parts of Ashitaba, 1-2 parts of cyclocarya paliurus leaves, 2-3 parts of sunflower leaves, 3-4 parts of baking powder and 8-12 parts of nutrition powder. The nutrition powder is made of crab shells and chicken bones, and therefore the biscuit powder can promote bone and marrow growth, nourish the muscle and tendon and treat fractures and has higher nutritive value; premixed biscuit powder is made of the main raw materials of oat powder and buckwheat powder capable of lowering blood pressure and blood sugar and various auxiliary raw materials capable of lowering blood pressure, the premixed biscuit powder only needs to be mixed with an appropriate amount of water to be kneaded into dough, and then the dough can be processed into biscuits; the method is easy and convenient to implement and suitable for household use, the biscuits made through the method are fragrant, sweet, crisp and tasty and have an obvious blood pressure lowering effect.