[The composition of evidence body of traditional medicine and recommendations for its evidence grading].

The concept of evidence in evidence based medicine (EBM) and the current main grading systems of evidence in the world were introduced systematically in this paper. And the methodological issues and challenges related to the efficacy evaluation of traditional medicine were analyzed. Targeting the characteristics and current status of clinical research in TCM, a proposal for evidence grading was suggested and recommended to provide the referential basis developing the clinical practical guidance of TCM.