Barley tea is a traditional refreshing and rich fragrant tea widely circulated among the people in China, Japan, South Korea, etc. It is also called barley tea and barley soup. It is a beverage made by roasting barley and then grinding it into powder. During the production process, it retains some of the original nutrients in barley, such as carbohydrates, plant protein, B vitamins, unsaturated fatty acids, etc. It has the effects of relieving heat, quenching thirst, aiding digestion, losing weight, and strengthening blood vessels. It is a new type of beverage with unique taste and health care function.