Due to lifestyle and dietary habits, many fat people suffer from fatty liver. According to research: obese, especially abdominal obese people are prone to fatty liver because the fat cells around the abdomen are more sensitive to stimulation, resulting in an increase in fatty acids delivered to the liver by the abdominal fat cells. In addition, obese people are mostly combined with hypoglycemic tolerance and hyperinsulinemia, which play an important role in the pathogenesis of obese fatty liver. As the surrounding tissues become less sensitive to insulin, the function of muscle uptake of glucose decreases, so that glucose cannot be fully utilized, and the excess glucose constantly stimulates pancreatic islet cells to secrete a large amount of insulin, and the liver, under the action of pancreatic islets, uses glucose and The liver, under the action of the pancreas, synthesizes a large amount of triacylglycerol from glucose and fatty acids, and endogenous hyperlipidemia and fatty liver occur. The degree of fat accumulation in the liver is proportional to body weight. 30% to 50% of obese people have fatty liver in combination, and the rate of fatty liver lesions in severely obese people is as high as 61% to 94%. When the weight of obese people is controlled, their fatty infiltration is also reduced or disappears. For this type of obese fatty liver, if the weight is already a large base obesity, ordinary weight loss methods are hardly effective. Currently, the more effective method to improve fatty liver is recommended to reduce weight through gastric reduction surgery. According to our data of weight reduction surgery for more than 1,200 patients for more than ten years, fat people who have had the surgery will lose more than 75% of their extra weight, and metabolic problems will be relieved and cured to different degrees after the surgery, especially for fatty liver. This is why many doctors at home and abroad recommend metabolic weight loss surgery as an effective method of weight control, and weight loss through surgery is now internationally recognized as a safe and efficient method.