The invention relates to an enriched-selenium cordyceps militaris biscuit processing and producing method, which mainly relates to the technical field of food and a preparation method thereof. The enriched-selenium cordyceps militaris biscuit processing and producing method comprises the following steps of preparing enriched-selenium cordyceps militaris to be ultra-fine powder with the grain size being 1mum through an ultrafine grinder, and obtaining nanoscale ultra-fine powder through a micro-nanoscale ultrafine grinder; uniformly mixing refined vegetable oil, beaten egg yolk liquid and fructose, uniformly mixing flour, baking powder and baking soda, sieving through a 40-mesh sample sieve, pouring the enriched-selenium cordyceps militaris nanoscale ultra-fine powder into the flour, pouring the flour into the vegetable oil mixture, and kneading to obtain dough so as to form biscuit bases; placing the biscuit bases onto bakeware, brushing a layer of egg yolk liquid on the surfaces, and baking; cooling to obtain enriched-selenium cordyceps militaris biscuits, and packaging. Selenium can be beneficial to reducing blood sugar concentration of diabetics, and boosting immunity and oxidation resistance; the nutritional ingredients of the enriched-selenium ultra-fine powder can be absorbed by a human body more easily; the fructose is used as a sweetening agent, and is suitable for hyperglycemia humans, diabetics and obesity people to eat.