Abstract:Objective:To compare the influence of different methods with YRW (yellow rice wine)on the composition of Siwu decoction.method:TCL-SM was used to determine the ferulic acid,paeoniflorin and matters dissolved in ether in Siwu decoction.Result:The Siwu decoction with YRW preparation has the highest contents,while the Siwu decoction containing Chinese Angelica root and Rehmammia root prepared with YRW has the lowest contents.Conclusion:The Siwu decoction prepared with YRW or added with YRW is more helpful for ferulic acid and paeoniflorin tole dissolve out than the Siwu decoction containing Chinese Angelica root and Rehmannia root prepared with YRW.