Astragalus is native to northern China and the elevated regions of the Chinese provinces Yunnan and Sichuan. The portion of the plant used medicinally is the four- to seven-year-old dried root collected in the spring. Astragalus root has played a prominent role in traditional Chinese medicine for hundreds of years. According to the University of Maryland Medical Center, modern scientific research indicates that astragalus root extract does, in fact, contain compounds that may make it useful in treating a variety of medical conditions, including cancer and heart disease. Astragalus is native to northern China and the elevated regions of the Chinese provinces Yunnan and Sichuan. The portion of the plant used medicinally is the four- to seven-year-old dried root collected in the spring. 2.Function 1) The Astragalus Plant Extract can improve the human body's systematic immunity and has the function of stepping down the blood pressure. 2) It can help the body to expand the blood vesseland and the coronary artery. 3) It is helpful to prevent the descend of the amount of white blood cell, haematoblast, reticulocyte, megakaryocyte. 4) The Astragalus Plant Extract can lengthen the life of the cells and delay the consenescence. 3.Application 1)Applied in the food field, it has become a new raw material which used in food and beverage industry; 2)Applied in the health product field, a natural health product to regulate sleeping; 3)Applied in the pharmaceutical field, it has the good effect on treating hepatitis.