Rapeseed oil, as the main edible oil source, is rich in fatty acids and multivitamins, with rich nutrition and easy digestion. Rapeseed oil is also the healthiest vegetable oil, and its saturated fatty acid content is no more than 7%, which is the lowest among all vegetable oils. Long-term consumption is beneficial to human cardiovascular health, and it is also beneficial to gallbladder function, which can promote bile lipophilia. In the pathological state of the liver, its fat can also be metabolized normally by the liver, which is beyond the reach of other animal oils. Rapeseed oil is also rich in linoleic acid and linolenic acid. Linoleic acid and linolenic acid are both essential fatty acids for animals. Linoleic acid participates in the synthesis of phosphorus in vivo, and appears in mitochondria and cell membranes in the form of phospholipids. Linoleic acid is needed for the repair of new and damaged tissues. Lack of linoleic acid will lead to growth stagnation, hair loss and female infertility. Rapeseed oil also plays an important role in food industry. It is very popular to make cream with low erucic acid rapeseed oil because it contains no cholesterol and its price is low.