This paper mainly deals with the extraction and refinement of the effective constituents of banian daqing extracted by alcohol circumfluence alclohol filtering with orthorhombic method and single factor method .The conclusions are as follow: (l)The extraction ratio of effective abstraction of composition of banlandqing by filtering is lower than that by ethanol backset current .(2) Licorice root backset current with ethanol is first performed, then banlandqing filter.(3) The optimum extract condition is tha...