China is a high prevalence area of Hepatitis B virus, and it is important to recognize the transmission route of Hepatitis B for the prevention and control of Hepatitis B. Hepatitis B virus enters the body through blood transfusion, blood products or broken skin and mucous membranes and causes infection. The main ways of transmission are as follows: 1, mother-to-child transmission: transmitted from mother with hepatitis B virus to fetus, is the most important way of hepatitis B virus infection in China. Most of them are infected during delivery, so it is very important for mothers-to-be with hepatitis B virus to go to regular hospitals to give birth and receive regular hepatitis B vaccine and hepatitis B immunoglobulin injections, most of which can effectively block the infection of the fetus. 2.Transmission by blood and body fluids: such as transfusion of blood and blood products, hemodialysis, organ transplantation, etc. are possible. 3, daily life contact transmission: mainly through the hidden gastrointestinal tract outside the transmission pathway, such as sharing razors, toothbrushes, etc.; or skin, mucous membranes have tiny breaks in contact with the hepatitis B virus. 4.Sexual contact: unprotected sexual contact with sexual partners carrying hepatitis B virus can spread hepatitis B virus. 5.Other ways of transmission: through the broken digestive tract, respiratory mucous membrane or insect bites and other ways of transmission have not been confirmed. Special reminder: 1, hepatitis B virus carriers are infectious; 2, hepatitis B vaccination and surface antibody production is protective; 3, high-risk groups need regular monitoring of hepatitis B surface antibody titer, to maintain effective protection; 4, ordinary daily work and so on will not transmit hepatitis B, so against hepatitis B discrimination.