The invention discloses an alga health-preserving wine and a preparation method thereof. The alga health-preserving wine is prepared from the following raw materials in parts by weight: 300-350 parts of grapes, 20-40 parts of algae, 20-30 parts of rhizoma dioscoreae, 20-30 parts of young corns, 15-20 parts of papaya, 2-4 parts of wall-broken pollen pini, 2-4 parts of semen nigellae, 2-4 parts of elm fruits, 1-2 parts of fructus psoraleae, 1-2 parts of globe amaranth, 2-3 parts of boussingaultia gracilis miers var leaves, 2-4 parts of russianolive flower, 2-3 parts of polygonum viviparum, 20-30 parts of maple sugar, 2-3 parts of sea cucumber peptide powder, 9-12 parts of yeasts and 10-12 parts of nutrition additives. The alga health-preserving wine prepared through the method disclosed by the invention can be used for enhancing the immune system, strengthening the bone, enhancing the physical ability and the endurance and resisting the diseases through the addition of nutritional components, namely the algae, the young corns and the like, thereby being beneficial to human health; in addition, the alga health-preserving wine disclosed by the invention can be used for promoting the fat metabolism of an organism, eliminating the symptoms, namely fatty liver, hyperlipemia, hypertension, coronary heart disease, uarthritis and the like, through the synergistic effect of multiple added traditional Chinese medicine components, thereby achieving the functions of weight reduction, body strengthening and health preservation.