The invention discloses a drink for treating diabetes. The drink is prepared from, by weight, 10-30 parts of blueberries, 15-40 parts of Chinese yams, 15-40 parts of bitter gourds, 10-30 parts of 
tremella fuciformis, 10-30 parts of pumpkins, 5-20 parts of soy beans, 15-40 parts of malt, 10-30 parts of 
schisandra chinensis, 10-30 parts of Chinese wolfberry fruits, 10-30 parts of 
Chinese chive seeds, 10-30 parts of chrysanthemum, 15-40 parts of hawthorn fruits, 10-25 parts of 
astragalus membranaceus, 10-25 parts of 
ginseng, 10-30 parts of 
semen cassiae, 10-30 parts of prepared 
rehmannia roots, 5-25 parts of 
semen coicis, 5-25 parts of dendrobe, 5-25 parts of Chinese dodder seeds, 5-25 parts of 
polygonatum odoratum, 5-25 parts of dogwood fruit pulp, 5-25 parts of sealwort, 5-25 parts of 
radix ophiopogonis, 10-30 parts of 
semen trichosanthis, 10-40 parts of 
oligosaccharide, 5-20 parts of 
malic acid and 27-160 parts of 
purified water. The invention further provides a preparation method of the drink for treating diabetes. According to the drink for treating diabetes and the preparation method thereof, 
processing is conducted on the basis of maintaining 
nutrient compositions and health care functions of 
raw material constituents, the drink for treating diabetes and the preparation method thereof have the advantages of being simple in production process and comparatively stable in finished product quality, the 
nutrient substances in the drink achieve a synergistic interaction effect, internal blood glucose is effectively adjusted and maintained in a 
normal state, and a certain health care effect is achieved.