The invention discloses an onion health care rice and a preparation method thereof. The onion health care rice is composed of rice, purple onion, corn flour, sweet potato, red kidney beans, Pleurotus eryngii, seabuckthorn fruit, wheat germ, smoked plum pulp, semen boitae, hawthorn leaf, Gerbera piloselloides Cass., peanut leaf and tuckahoe. The invention has the beneficial effect that onion has the effects of moistening intestines, rectifying qi, harmonizing stomach, tonifying spleen, promoting appetite, dispersing wind-cold, warming the middle jiao, activating yang, helping digestion of meat, refreshing, strengthening the body, dissipating blood stasis and detoxifying, but many people can not accept the spicy taste, therefore the onions are processed into daily edible rice product, which has good effect on improving the physical quality of the public.