The best preparing process was: 4 times of soaking water as quantity as Armeniaca, extracting for 15 mins by ultrasound at 400 W power, collecting 1 time aqua armeniacae as quantity as armeniaca was a best technique.

• 加药材量4倍水,400W功率,间歇超声15min,无须浸泡,收集1倍药材量馏出液为最佳工艺,本法可大大缩短工时,提高收率。