Diabetes has the potential to affect liver function. Disorders of glucose metabolism in diabetic patients will increase the risk of fat metabolism disorders, the increase of free fatty acids in the serum will enter the liver, and at the same time, high blood glucose will also cause the glycosylation of apolipoproteins, resulting in increased fat content in the liver cells, and the continuous accumulation of fat in the liver may lead to the occurrence of fatty liver. If patients with fatty liver are not relieved in time by diet control, proper exercise and medication, then fatty liver can further develop into cirrhosis, in which liver function is severely impaired. Therefore, diabetes is likely to have an effect on liver function. In addition to that, diabetes of hepatic origin may be induced when liver function is abnormal. Patients with diabetes mellitus who have abnormal liver function are advised to go to the hospital and ask the doctor to make a judgment and clarify the cause.