Hepatitis B surface antibody >1000IU/L is normal. Hepatitis B surface antibody belongs to a kind of protective antibody, which is produced after the body receives the stimulation of Hepatitis B surface antigen, and can protect the body from the attack of Hepatitis B virus. Its test standard is 0-10IU/ml, if the result is >10IU/ml, it is positive. The higher the titer of Hepatitis B Surface Antibody, the better its ability to clear the Hepatitis B virus. Hepatitis B surface antibody can be acquired in two ways: the first one is through hepatitis B vaccination, usually three shots, which can make the body produce protective antibody. The second one is hidden infection, that is, people who have been exposed to the hepatitis B virus may not have any clinical symptoms, and the body’s immune system will spontaneously clear the virus, so that the body will produce protective antibodies.