Hepatitis B surface antigen is HBsAg, the range of hepatitis B surface antigen quantitative normal should be less than 0.05IU/ml, hepatitis B surface antigen quantitative 2000IU/ml, highly suspicious of hepatitis B virus infection, but need to be combined with the hepatitis B five specific analysis. Hepatitis B surface antigen positivity in hepatitis B five tests has three conditions that need to be identified. 1. Hepatitis B surface antigen and hepatitis B core antibody are positive, representing acute hepatitis B virus infection or chronic HBsAg carrier. 2. Positive Hepatitis B surface antigen, Hepatitis B core antibody and e antibody represent the recovery of acute Hepatitis B virus infection or chronic HBsAg carriers, which is commonly known as minor triple positive. 3. Hepatitis B surface antigen, e antigen, e antibody positive suggests the existence of acute and chronic hepatitis B virus infection, and hepatitis B virus replication speed, highly infectious. Patients should consult a doctor in time, complete the hepatitis B five relevant examinations, use antiviral drugs such as tenofovir and propofolovir under the guidance of the doctor, and do not take medication on their own.