It is present in the form of glycerides in dark green plants. It is the main component of human tissue cells and can be synthesized in vivo. Converted to the vital life factors DHA and EPA necessary for the body. The extraction of linolenic acid by adsorption resin is an ideal choice. Easy operation and high product purity, and has good application prospects. The linolenic acid extraction resin provided by Suzhou Bojie Resin Technology Co., Ltd. (www.bojieresin.com) has the advantages of good selectivity, large adsorption capacity, high mechanical strength and convenient regeneration treatment, and is widely used in the extraction of linolenic acid.