The invention relates to a making method of cordyceps militaris mushroom residue biscuits. The making method includes the steps that rice or wheat cordyceps militaris mushroom residues with cordyceps militaris fruiting bodies harvested are collected, dried, crushed conventionally, puffed through a screw machine, and superfinely crushed to be in the range from 300 meshes to 2000 meshes, and then cordyceps militaris mushroom residue super-fine powder is acquired; protein sugar, baking powder and salt are dissolved in vegetable oil, self-raising flour and the cordyceps militaris mushroom residue super-fine powder are mixed, sieved and added, and soft dough is formed through kneading; a patch of dough is taken, kneaded into a round shape and slightly flattened, and biscuit blanks are made; the biscuit blanks are placed in a baking tray, placed in an electric oven to be baked, and then cooled, and therefore the cordyceps militaris mushroom residue biscuits are acquired and packaged. The puffed and superfinely-crushed cordyceps militaris mushroom residues exist in raw materials of the biscuits, and the biscuits have the antibiosis effect, the anti-cancer effect, the nourishing effect, the immune adjustment effect, the sedative-hypnotic effect and the like; the biscuits are easily absorbed by the human body and can supplement nutrients and energy which are needed by the human body; the protein sugar serves as a sweetening agent, and the biscuits are suitable for being eaten by hyperglycemia patients, diabetes patients and obese patients; the biscuits have edible safety; waste materials are not generated, and the environment is not polluted.