Walnut oil, as a common edible oil, does not have the efficacy and effectiveness of drugs, but it can provide a variety of unsaturated fatty acids and other nutrients for the human body. As an edible oil, walnut oil has distinctive nutritional characteristics, with an unsaturated fatty acid content of more than 90%, which contains 18.1% oleic acid, 65.4% linoleic acid, and 9.4% linolenic acid. Every 100 milliliters of walnut oil contains 22.84 milligrams of vitamin E, as well as 1.6 grams of calcium, 0.4 milligrams of iron. The linoleic acid and linolenic acid are polyunsaturated fatty acids and oleic acid is monounsaturated fatty acid, especially the linoleic acid and linolenic acid are essential fatty acids. Unsaturated fatty acids can reduce the content of low-density lipoprotein in the blood and increase the content of high-density lipoprotein, which is beneficial to cardiovascular and cerebrovascular. So as an edible oil, walnut oil is a relatively high quality source of fatty acids, but walnut oil, although rich in nutritional value, but it is not recommended to eat more, easy to lead to obesity and other nutritional problems. At the same time, it is recommended that a variety of edible oils to eat a mixture, so that you can take full advantage of the advantages of different edible oils, increase the diversity of meals, to meet the diverse nutritional needs of the human body.