The invention mainly provides a making formula of medicated diet biscuits capable of strengthening immunity of human bodies. The cookie biscuits are mainly made from wheat flour, glucoamylase, alpha-amylase, eggs, black sesame seeds, bananas, white granulated sugar, yeast powder, red wine, red grape blades, palm oil, a leavening agent, an antioxidant and the balance of purified water. The making formula is reasonable in making, the bananas and the yeast powder are added to the components of the biscuits, the bananas and the yeast powder are rich in vitamin B6, and the vitamin B6 is a vitamin substance, so that the immunity of human bodies can be effectively improved, and various diseases can be prevented; and besides, through action of the yeast powder, the taste of the bananas can be effectively diffused, and the entire mouth feel of the biscuits can be effectively improved. Further, the red wine and the red grape blades are rich in polyphenolic substances, and the polyphenolic substances can effectively prevent pathological change cells from diffusing, and besides, can improve the immunity of human bodies, so that the pursuit of people for food and drink health is further met.