Astragalus membranaceus is a common tonic in daily life, which has the following functions: First, invigorating qi and rising yang. It is used for proctoptosis, uterine prolapse, metrorrhagia, dizziness and fatigue caused by qi deficiency, and is often used with Cimicifuga and Bupleurum. The second is to consolidate the exterior and accumulate sweat. It is mostly used for spontaneous sweating caused by physical weakness and exterior weakness. If the exterior qi is not firm, sweating due to exogenous cold, it will be effective to treat it with Astragalus membranaceus combined with Atractylodes macrocephala and Saposhnikovia divaricata for a long time. The third is to support sores and discharge pus. It can be used for treating ulcers that are invaginated without ulceration for a long time, and has the function of promoting ulceration and limitation. It is used for healing wounds and ulcers after they have been ulcerated for a long time. It is often combined with honeysuckle, spina gleditsiae and Herba Violae. The fourth is diuresis and detumescence. It is used for asthenic edema caused by yang deficiency, and is often combined with Fangji, Poria and Atractylodes macrocephala.