People who do not know about liver cancer are asking whether liver cancer is contagious. Due to the high mortality rate of liver cancer, many people are afraid to suffer from this disease. In fact, liver cancer is not contagious. The transmission of liver cancer caused by viral hepatitis is only the transmission of hepatitis B virus. Then, how to prevent liver cancer? Since the main causes of liver cancer in China are hepatitis, aflatoxin and drinking water pollution, many medical scholars believe that the strategy of liver cancer prevention should be “changing water, managing food and preventing hepatitis”. 1.Changing water: The purpose of changing water is to reduce drinking water pollution, which is a measure that may work in a relatively short period of time. Change the water mainly to stagnant water for living water, from drinking pond water, house ditch water into drinking and water, deep well water, tap water. In cities, the water source with less pollution is used as tap water, and the use of medicinal charcoal water purifiers is promoted. The change of water has led to a decrease in the incidence of liver cancer in some areas. 2, the management of food: the focus of the management of food for easy to produce aflatoxin peanuts, corn. Mold prevention mainly includes the prevention of corn, peanuts to poison, such as from the harvest to preserve the process of moisture and mold and has been moldy food processing; screening with resistant varieties, that is, not easily contaminated by mold; collection should be dry and ventilated and regularly monitored to control the moisture of grain at less than 10%; avoid eating food that has been moldy. 3, anti-hepatitis: China’s liver cancer patients, hepatitis B virus infection rate is much higher than other viral hepatitis, so in China is mainly anti-hepatitis B. Timely vaccination against hepatitis B and strict screening of blood donors. The prevention of liver cancer should start from the cause of the disease. Other preventive measures for liver cancer include: abstaining from alcohol, reducing pollution by pesticides such as organic grasp, and supplementing trace elements such as selenium; selenium has the functions of inducing differentiation and inhibiting proliferation. You can also eat some liver-protective foods in daily life, such as mushrooms and cabbage.