There are many viruses that are DNA viruses, and the common hepatitis B virus is a DNA virus. High hepatitis B virus load is a high incidence group of liver cancer and cirrhosis, so hepatitis B virus carriers with high load should have regular checkups of liver function, quantification of hepatitis B five items, HBV-DNA, methemoglobin, blood routine, liver ultrasound and liver elasticity, etc. They should be checked every 3-6 months, through which the damage of liver and virus carriage can be found in time. In addition, early stage patients with cirrhosis and liver cancer can be detected in time for early detection and treatment. If antiviral therapy is suitable, it must be carried out as early as possible. The goal of treatment is to minimize the viral load, reduce the occurrence of cirrhosis and liver cancer, and improve the quality of life of patients in order to prolong their life span.