The essence of obesity is the increase of adipose tissue in the body. The increase of adipose tissue causes the increase of adipose tissue decomposition metabolism, which leads to the increase of free fatty acid in the body, and the large amount of free fatty acid in the blood is constantly transported to the liver, and the synthesis of fat in the liver increases, and fatty liver can be formed when the fat transport capacity of the liver is exceeded. In addition, abnormal secretion of adipose hormone such as tumor necrosis factor-α in obese tissue can lead to insulin resistance, which is manifested as hyperinsulinemia, and hyperinsulinemia can also promote the decomposition of adipose tissue, resulting in increased flow of free fatty acids into the liver. resulting in fat deposition in hepatocytes. Therefore, it is crucial for patients with fatty liver caused by obesity to lose weight, and only by losing weight and reducing excess adipose tissue in the body can the source of liver fat be effectively controlled.