Abstract： Danggui Shaoyao San Decoction comes from Jin Gui Yao Lve (Essentials from the Golden Cabinet)，which is composed of three kinds of "medicines of blood system" and three kinds of "medicines of water system". It plays the role of harmonizing liver and spleen as well as regulating qi，blood and water. For patients with blood deficiency，the dosage of three kinds of medicines of water system should be small； for patients with blood stagnation， the dosage of three kinds of medicines of blood system should be large；for patients with excessive dampness and edema，three kinds of medicines of water system should be mainly applied to achieve a better effect. Water and liquor are decocted together to achieve the effect of diffusing and unblocking. It has a good effect in the clinical use for obstetrics and gynecological diseases， such as abdominal pain，edema during pregnancy，irregular menstruation，and perimenopausal syndrome.