1, pay attention to the safety of drinking water. (1) Some drinking water is often contaminated by PCBs and chloroform, (2) blue-green algae growing in ponds are strong carcinogenic plants, (3) Toxoplasma gondii infection can stimulate bile duct epithelial proliferation, which can lead to primary bile duct cancer. 2. Throw away the moldy food at home. Especially moldy corn and peanuts, because these foods contain aflatoxin and aflatoxin B1, a metabolite of aflatoxin, can lead to liver cancer, so it is recommended to eat more fresh food. 3. Maintain a healthy weight, refuse to be obese and stay away from diabetes. Because obesity and diabetes are important risk factors to induce liver cancer. 4.Long-term alcohol abuse is the first killer that damages liver. After alcohol enters the body, it is mainly decomposed and metabolized in the liver. The toxicity of alcohol to liver cells causes the breakdown and metabolism of fatty acids to become impaired, resulting in fatty liver deposits in the liver. The more alcohol you drink, the more serious the fatty liver will be, and can also induce liver fibrosis, which can lead to liver cirrhosis and even liver cancer. 5.Viral hepatitis is the most important factor among many pathogenic factors of primary liver cancer. There are about 120 million HBsAg positive people in China, so it becomes the country with the highest incidence of liver cancer in the world. In particular, hepatitis B and C viruses are closely related to the development of liver cancer. The presence of cirrhosis is a common feature of most stem cell cancers, and about 70% of primary liver cancers occur on the basis of cirrhosis, and most of them are developed from chronic hepatitis B and C. 6.Regular checkup is the easiest way to detect liver cancer early. Regular physical examination is recommended, especially for high-risk groups (hepatitis B or C patients), it is better to check whether there is cancer through AFP test or ultrasound every six months. 7.Self-examination: Most of the manifestations of liver diseases are mainly based on digestive symptoms. Once symptoms such as unexplained nausea, vomiting, abdominal distension, loss of appetite, weakness and aversion to oil and grease appear, it is important to realize that there may be problems with the liver.