This study was based on the recently proposed research pattern of Traditional Chinese Medicine (TCM)– multi-component library (MCL). Danggui (the roots of Angelica Sinensis (Oliv.) Diel) was selected as the research target of the study. A systematic separation method for Danggui was founded on the multi-model separation techniques which would be served as complementarities of others. And some kinds of modern analytical techniques were utilized to elucidate the chemical characterization of the c...