Abstract: Classified Materia Medica compiled by Tang Shenwei is a great collection of Materia medica before the Northern Song Dynasty. One of the quoted books, Sun Zhenren Shiji, has been lost, and the basic information of this book is not detailed. Through collating the lost articles, it is found that Classified Materia Medica is the earliest existing book that contains the contents of Sun Zhenren Shiji. A total of 62 articles are quoted from Sun Zhenren Shiji, involving 27 dietary regimes and 35 prescriptions. The collated literature was compared with the articles of Qianjin Yaofang and the citations of Classified Materia Medica, it is speculated that Sun Zhenren Shiji is an independent herbal monograph on diet therapy. This book is based on food treatment chapter of Qianjin Yaofang, and adds the relevant contents such as prescriptions. The basic contents of the book are dietary herbal medicine, health preserving, suitable and contraindicated conditions of diet and food therapy prescriptions. It is speculated that the author of this book was SUN Simiao, but could not rule out the possibility that it was a pseudonym. This study provides a certain reference for the collation of health preservation and materia medica literature.