Fatty liver disease, or fatty liver for short, is a condition characterized by excessive accumulation of fat in liver cells caused by various reasons. Fatty liver is posing a serious threat to human health, becoming the second most common liver disease after viral hepatitis and a common cause of occult cirrhosis. According to statistics, more than 15% of the population have different degrees of fatty liver (alcoholic or non-alcoholic). An Yong, Department of Liver Diseases, Shandong Qianfoshan Hospital The causes of fatty liver are multifaceted, which are mainly related to people’s diet and lifestyle, including the intake of high-fat and high-protein foods, as well as drinking too much alcohol, little exercise, obesity, malnutrition and so on. Early detection and prevention of fatty liver is crucial, together with adjusting living habits, reasonable diet, moderate exercise, weight control, as well as medication and basic treatment, the condition can be effectively controlled or even completely reversed, and the progression of cirrhosis can be effectively prevented.