Patients with acute liver failure may be completely cured in mild cases. Liver failure is severe liver damage caused by a variety of factors. Acute liver failure, on the other hand, is an acute onset of liver failure without a history of underlying liver disease, characterized by hepatic encephalopathy of II degree or higher within 2 weeks. However, since liver cells can be regenerated, patients with mild acute liver failure may be completely cured with aggressive treatment. In severe liver failure, however, liver function has been severely impaired or decompensated, and is often accompanied by serious complications such as coagulation disorders and hepatorenal syndrome, resulting in a poorer overall prognosis. Acute liver failure must immediately seek medical treatment, strictly comply with medical advice. Attention should be paid to dietary regulation, reasonable and balanced distribution of nutrients, ensuring sufficient energy intake while controlling the intake of protein and salt. Absolute bed rest during treatment, reduce physical exertion.