Usually, the number of years you can live with hepatitis B major third-positive needs to be judged according to the degree of the disease, etc., and cannot be generalized. Depending on the degree of the patient’s disease, if the disease is only viral hepatitis B, which belongs to the early stage of infection, the disease can be controlled through active treatment or regular review and has no impact on life expectancy. If a patient with hepatitis B major third-positive develops cirrhosis, survival is likely to be greatly affected, from a few years to more than 10 or decades. If gastrointestinal bleeding, hepatic encephalopathy, hepatorenal syndrome, and liver failure develop, the patient is likely to experience death within a short period of time. If primary liver cancer is present, it is more serious and the five-year survival rate of patients does not exceed 30%. The dietary principles for such patients are three low, low salt, low fat and low sugar, and pay attention to balanced nutrition, avoid smoking and alcohol, avoid overexertion, choose appropriate exercise, and regularly review the five hepatitis B tests and liver function.