The invention discloses a selenium-enriched medicine and food homologous black hair dietary powder and a preparation method thereof, which is composed of the following ingredients in parts by mass: 15-25 parts of dry black beans, 15-25 parts of black mulberry, and 10-15 parts of roasted black sesame 10‑15 parts of black fungus, 5‑15 parts of sealwort, 5‑15 parts of raspberry, 5‑15 parts of poria cocos, 5‑15 parts of wolfberry, 5‑15 parts of Chinese yam, 5‑15 parts of green papaya powder, 5‑15 servings of blackberries, 5‑16 servings of instant walnut kernels. The raw material crushing and steam fumigation treatment of the selenium medicine and food homologous UFA dietary powder prepared by the present invention is beneficial to the overflow of effective nutrients, so that the nutrition, palatability, absorbability and non-adhesiveness of the product are improved. It has been greatly improved, because selenium itself has the functions of scavenging free radicals, reducing blood viscosity, lowering blood lipids, significantly reducing cholesterol, triglycerides and low-density lipoproteins, sealwort, poria cocos, wolfberry, etc. are beneficial for improving blood deficiency, and also To reduce the possibility of gray hair, it is especially beneficial to the infirm, sub-healthy, middle-aged and elderly people, and patients with premature gray hair.