Method for extracting active ingredients of artemisia selengensis through freeze thawing

The invention relates to the technical field of separation and extraction of natural products, in particular to a method for extracting the active ingredients of artemisia selengensis through freeze thawing, which comprises the following steps: chopping fresh artemisia selengensis, freezing the chopped fresh artemisia selengensis in a refrigerator, and carrying out thawing to complete one freeze thawing; and putting the artemisia selengensis subjected to freeze thawing for multiple times into a container, carrying out immersion extraction by adopting normal hexane and then carrying out rotaryevaporation to remove the normal hexane to obtain artemisia selengensis essential oil, or carrying out immersion distillation by adopting distilled water and then carrying out rotary evaporation to obtain artemisia selengensis distillate. The active ingredients of artemisia selengensis are extracted by adopting a freeze-thawing method, the extraction amount of the active ingredients of artemisia selengensis can be increas