The invention relates to a diet for dietotherapy and health preservation which is prepared by medicine-food materials, and belongs to the field of nutrition and health preservation; the basic formula comprises the following raw materials on a dry weight basis: 30-60 parts of black sesame, 4-6 parts of poria cocos, 2-8 parts of hawthorn, 2-8 parts of medlar, 2-5 parts of coix seeds, 1-5 parts of spine date seeds, 2-5 parts of lotus seeds, 2-5 parts of Chinese yam, 1-5 parts of lily, 5-10 parts of jujube, 1-5 parts of donkey-hide gelatin, 1-4 parts of roses, 2-8 parts of carrots, 2-5 parts of walnut kernels, 2-5 parts of pumpkin seeds, 2-5 parts of black soybeans, 2-5 parts of black fungus, 1-3 parts of honeysuckles, 1-3 parts of sea-tangle, and 1-3 parts of mulberry. The invention can alsobe combined with other materials to form a secondary formula by using the basic formula as a main component. The formula of the invention is not excessively cold or hot, has a moderate character and taste, is convenient for using, has a less using amount, can be eaten frequently for a long term, has a lot of efficacy and effect and definite effect, and the efficacy is confirmed to reach the expectation and to be satisfied through long-term eating by a lot of people.