Fatty liver is not directly related to primary liver cancer, but prolonged fatty liver can increase the chance of cancer, and the exact time of liver cancer cannot be specified. The vast majority of patients have a good prognosis and will not become cancerous after active treatment. Fatty liver and liver cancer are two different diseases, but there is a certain degree of correlation, the causes of fatty liver, such as excessive alcohol consumption, also belong to the important pathogenesis of liver cancer, cirrhosis and liver cancer in our country, alcohol is the second cause of cirrhosis and liver cancer after hepatitis B. Therefore, fatty liver is somehow related to liver cancer, but the time of liver cancer is not clear. Therefore, fatty liver, to some extent, promotes the occurrence of liver cancer. Usually, the probability of simple fatty liver cancer is low, generally about 1-2%. However, if long-term fatty liver is not well controlled, it will gradually develop into fatty cirrhosis, and the probability of cancer will increase significantly, which may reach about 20%. Therefore, after the discovery of fatty liver, patients need to give early intervention, actively control the adverse factors, most of the early mild fatty liver can be reversed and cured. Patients with benign fatty liver disease should pay attention to diet and exercise management in daily life, and their condition can be significantly improved.