To elucidate scientific connotation of nature and flavour of Achyranthis Bidentatae Radix

as well as provide theoretical basis for guidingits clinical practice and scientific research.Herbal textual research onAchyranthis Bidentatae Radix from ancient herbal works and modern data analysis.Through textual research from ancient herbal literatures

we found that Achyranthis Bidentatae Radix and Cyathulae Radix used now was in accordance with the plant recorded in these ancient herbal literatures.In addition

evolution process of its nature was neutral

flavour of Achyranthis Bidentatae Radix was from bitter or sour to bitter

sour and sweet

flavour of Cyathulae Radix from bitter and sour to bitter and sweet was found

and evidence of nature and flavour of Achyranthis Bidentatae Radix and Cyathulae Radix existed was elucidated.This work can provide important reference for research on nature and flavour

development and clinical application of Achyranthis Bidentatae Radix and Cyathulae Radix.