Classical famous prescription Dihuang Yinzi is widely used in modern clinical practice，and can treat many kinds of diseases，especially the diseases of nervous system in internal medicine. Its clinical effect is accurate，but it has not been converted into Chinese patent medicine preparations. Therefore，the authors have collected ancient traditional Chinese medicine（TCM） literatures of Dihuang Yinzi by the methods of bibliometrics，and selected and sorted out 254 pieces of effective data， involving 144 ancient books of TCM，and systematically summarized and analyzed the historical development origin，main treatment syndrome，formula making principle，dosage，preparation method，decoction method and medicine taking method of Dihuang Yinzi，in order to provide the ancient literary evidence support for the development and clinical application of classic famous prescriptions. It is found that Dihuang Yinzi was from

Xuanming Lunfang

written by LIU He-jian

，

a doctor of Jin dynasty. It was composed of 12 kinds of herbs，namely Rehmanniae Radix Praeparata，Morindae Officinalis Radix，Corni Fructus，Cistanches Herba，Dendrobii Caulis，Aconm Lateralis Radix Praeparaia，Schisandrae Chinensis Fructus，Cinnamomi Ramulus，Poria，maimendong，Acori Calami Rhizoma and Polygalae Radix

and mainly used for the treatment of Yinfei. The later records of Dihuang Yinzi mostly followed the prescription composition and main treatment set forth in

Xuanming Lunfang

，and its clinical application was expanded. In the 199 articles with the indications for disease treatment，Yinfei was the most commonest indication

and took up about half of the total，which was followed by stroke，taking up about two fifths of the total. It was also used for the treatment of sudden aphonia，flaccidity syndrome，vertigo，enuresis. Dihuang Yinzi has a wide range of treatment，but the pathogenes is always belongs to "the deficiency of water and fire in the kidney". The recipe of Dihuang Yinzi was unique，and can be used to treat both the upper and lower parts of the body，as well as both the outward symptoms and root causes of an illness at the same time， in particular，it mainly focuses on the treatment of the lower and the root. Among the 56 literatures with drug dosage records，about one third of them inherited the records of

Xuanming Lunfang

: "Equal division，the top is the end，3 qian for each dose." The dosage was generally light. The preparations are mostly decoction and boiled powder. In the decocting and taking methods，it was suggested that "turbid medicine shall be boiled for a short time，and taken after several boilings，with no limit to time."