Trans fatty acid is a fatty acid with hydrogen ions on both sides of the carbon chain from the chemical structure, which can be called trans fatty acid. Trans fatty acids are harmful to the body, and if consumed in excess, they can cause atherosclerosis, coronary heart disease, lower limb atherosclerosis and other cardiovascular and cerebrovascular diseases that are harmful to health. In food, TFA can enhance the aromatic taste of food and make some food taste relatively more delicious. However, if the intake of TFA is too much, only taking into account the delicious taste without considering the health, TFA over a certain amount is more harmful to the body.