The invention discloses a preparation method of special natural soda water with anthocyanin for drinking for astronauts. Anthocyanin of various plant sources is adopted in the preparation method of the special natural soda water with the anthocyanin for drinking for the astronauts so as to enhance physiological functions of the natural soda water, and thus, the prepared special natural soda waterwith the anthocyanin for drinking has multiple physiological functions, such as the functions of resisting oxidation, resisting fatigue, preventing hypertension, protecting the blood vessels, resisting atherosclerosis, resisting tumors and so on; and therefore, the natural soda water with the anthocyanin for drinking has very good protective effects on the body of the astronauts. A formula of thespecial natural soda water with the anthocyanin for drinking for the astronauts comprises the following ingredients: 200 milligrams of natural anthocyanin in per 300 milliliters of natural soda water,wherein the natural anthocyanin is composed of 60-70 milligrams of blueberry anthocyanin, 18-22 milligrams of lonicera caerulea anthocyanin, 18-22 milligrams of black chokeberry anthocyanin, 28-32 milligrams of black currant anthocyanin, and 60-70 milligrams of cranberry anthocyanin; and thus, special nutritional needs of the astronauts can be met. The preparation method of the special natural soda water with the anthocyanin for drinking for the astronauts comprises the following technological processes of taking natural soda water, carrying out crude filtration, carrying out fine filtration,carrying out ozone sterilization, adding anthocyanin, carrying out homogenization, carrying out ultra-filtration, carrying out filling, carrying out capping, carrying out packaging, and obtaining final products. By adopting the preparation method, special odor of the natural soda water can be improved; and protective effects on the body of the astronauts can be achieved.