Extraction method of iris lactea volatile oil

The invention provides an extraction method of iris lactea volatile oil. The iris lactea volatile oil is extracted through supercritical carbon dioxide extraction method. The extraction method comprises following steps: a, iris lactea raw material is crushed and sieved so as to obtain a crude powder; b, the crude powder obtained in step a is introduced into an extraction kettle, supercritical carbon dioxide gas is introduced, extraction is carried out for 2h, and obtained volatile oil is collected, wherein the extraction pressure is controlled to be 3000 to 4500Psi, the extraction temperatureis controlled to be 30 to 45 DEG C, and carbon dioxide gas flow speed is controlled to be 9 to 18ml/min. The invention also provides the iris lactea volatile oil extracted using the extraction method.The yield of the extraction method is obviously higher than that of other technology, and excellent theory theoretical foundation is provided for exploitation and utilization of iris lactea. 本发明提供了种马蔺挥发油的提取方法，它是用超临界二氧化碳萃取法提取的