Green juice is a beverage made of natural green plants, such as tender leaves of barley, sweet potato, tender leaves of Chinese cabbage and green orange, or blended with superfine powder. The material of green juice is not limited to cultivated vegetables, as for wild vegetables, mountain vegetables, leaves and so on. As long as it is non-toxic and rich in high-quality vitamins, minerals and chlorophyll, almost all of it can be made into green juice. At present, many Japanese enterprises are popular in making green juice products with Angelica keiskei, tender barley leaves, tender wheat leaves, mulberry leaves and various green vegetables, and these products also shine brilliantly in the health food industry. Plants rich in vitamins, minerals and chlorophyll, such as wild vegetables, crops and young fruits of some citrus fruits, can be made into green juice. There are many kinds of green juice products abroad, which are also very popular in China at present, such as Jinhe Green Juice, DHC Tomorrow Juice, Yamamoto Korean Mulberry Leaf Juice, Kirin Barley Ruoye Soymilk Green Juice and so on. Nutritionists have found that plant green juice is not only rich in chlorophyll, but also contains more flavonoids than other mature plants, which has health care effect on human body and is suitable for long-term drinking.