The main transmission channels of hepatitis B virus are as follows: 1. mother-to-child transmission, mother-to-child transmission used to be one of the important factors of hepatitis B epidemic in China. 2. blood transfusion transmission, after importing blood and blood products infected by HBV, it can cause the occurrence of hepatitis B after blood transfusion. 3. close living contact transmission, skin mucosa is the natural barrier of human body, when the skin mucosa is damaged and at the same time contacted with When the blood of hepatitis B patients is damaged, the risk of infection with hepatitis B virus is increased. In addition, sharing razors, toothbrushes, towels, etc. all increase the risk of infection with hepatitis B virus, these can be called close living infection. 4, sexual transmission, for hepatitis B patients can be transmitted through sexual intercourse, foreign hepatitis B, hepatitis C are classified as sexually transmitted diseases. 5, medical source of infection, such as sharing unclean syringes, dental treatment instruments that are not strictly sterilized. And mosquito bites are not recognized as a route of transmission, by the mosquito bite on the fear of a little, there is no need. For the above transmission channels, in daily life should pay attention to: 1, to avoid the transmission of daily life contact: such as razors, toothbrushes and toiletries must be personal use; after taking public transportation, after counting money wash your hands; etc. 2, prevention and control of sexual contact transmission: premarital examination such as one party is a carrier of hepatitis B virus, the other party should first be vaccinated against hepatitis B; avoid unhealthy high-risk sexual behavior. 3, for already Pregnant women who are already infected with hepatitis B virus should be standardized for mother-to-child blocking to prevent infection of infants and children.4. If dental treatment is needed, medical units with strict sterilization measures should be chosen as much as possible.5. For people who do not have hepatitis B surface antibody in their bodies, they should be vaccinated against hepatitis B.