The invention relates to a liquid drink, namely a barley grass juice liquid drink with barley grass juice powder or barley grass juice as a main raw material. The liquid drink is prepared by taking the barley grass juice powder or barley grass juice and simultaneously adding traditional Chinese medicine raw materials, purely natural plant raw materials, crops, aquatic products, livestock products, various probiotics, sugars, drink accessories, mineral water or purified water and the like in a certain ratio. The product is purely green food, has rich nutrients, and has the advantages of improving the physical ability and vigor, improving the sleeping quality, reinforcing immunoregulation, delaying senility, improving climacteric syndromes, improving the metal stress, regulating intestines and stomachs, aiding digestion, improving body odor, halitosis and constipation, improving the symptoms such as allergy, dermatitis and the like, purifying blood, effectively removing various toxins in bodies, reducing the blood lipid, regulating the blood pressure, improving the cardiovascular and cerebrovascular diseases, losing weight, beautifying the skins, improving and regulating bad symptoms of various organs of bodies, supplementing various nutritive elements required by bodies, meeting health requirements of different crowds, preventing calcium deficiency, preventing osteoporosis and the like.