The invention relates to a health food with nanometer functions and a processing method thereof. The health food comprises 40-70wt% of wheat bran, 10-45wt% of medicinal food, and 5-30wt% of agricultural and sideline products; the wheat bran refers to wheat bran and buckwheat bran, wherein, the wheat bran accounts for 60-90% of the total wheat bran and the buckwheat bran accounts for 10-40% of thetotal wheat bran; the medicinal food comprises Chinese yam, tuckahoe, gordon euryale seed, kudzuvine root and malt; and the agricultural and sideline products are selected from a group which consistsof red date, black date, black fungus, bitter gourd, celery and carrot, wherein, the medicinal food is processed into nano-grade particles. The health food of the invention is prepared by using high-quality dietary fiber, natural edible Chinese medicinal materials and foods with rich contents, and is fully considered that the mutual supplement and collocation of various natural and beneficial ingredients is carried out. The health food does not contain any western medicine, heavy metal and toxic substances, and has good nutritional adjuvant therapy and rehabilitation and healthcare effects onregulating blood sugar and lipid, reducing weight, relaxing the bowels, alleviating and removing angiosclerosis.