The high surface antibody to hepatitis B virus is caused by the following three reasons: 1, natural infection, such as infection with hepatitis B virus, the body’s immunity is stronger, the hepatitis B virus clearance after the production of hepatitis B surface antibody, the most common are acute hepatitis B virus infection in adulthood. 2, in daily life and close contact with hepatitis B patients, the body is constantly exposed to hepatitis B virus, stimulating cellular immunity to produce the corresponding surface antibody. The higher the value of hepatitis B surface antibody, the stronger the immunity of the body, which is a good thing.