Yi Wen Zhi in Han Shu summarised the understanding of "medical classics" and listed bibliographic details of relevant materials, providing instructive significance for the research of medical documents with unearthed Bamboo Slips and Silk. However, the classification and understanding of it are currently not identical in terms of content. This paper believes that the content of "medical classics" has to be based on the medical theory documents with Banboo Slips and Silk from the Ma Wang Dui Han Tomb, Zhang Jia Shan Han Bamboo Slips and Lao Guan Shan Han Bamboo Slips, in particular, part of the Ri Shu in the Warring States Period, Qin and Han Dynasties, after re-combing out the medical documents with unearthed Bamboo Slips and Silk systematically.