Objective To study the extraction process of the essential oil from cortex moutan,rhizoma chuanxiong and rhizoma acori tatarinowii.Methods The cortex moutan and rhizoma chuanxiong oils,the rhizoma acori tatarinowii oil and their mixed sample′s oils were obtained by the mixed material-water reflux condensation and the extraction process was evaluated by the weight of essential oil.Results The weight of essential oil in the extraction process had no significant differences between them.Conclusion By the mixed material-water reflux condensation,t...