Maintain a happy psychological state, develop good eating habits, forbid spicy food, eat less thick and greasy food, and do not drink strong alcohol. For people over 40 years old, especially women, they should have regular ultrasound examination, and if they are found to have gallbladder infection, gallstones or polyps, they should follow up the examination, and any changes in their condition should be treated early. Before actively treating cancerous lesions, we should remove the causative factors that may cause cancerous lesions sooner or later. The prognosis of bile duct cancer is not very satisfactory, among which the prognosis of bile duct cancer is extremely poor. The average survival of bile duct cancer surgical resection group is 13 months, and rarely survives for 5 years. If internal or external bile duct drainage is done alone, the average survival is only 6-7 months, rarely more than 1 year. Prevention of biliary tumors should focus mainly on early treatment of their closely related diseases and precancerous lesions. Non-invasive ultrasound should be used as the basic means of screening for this disease. The etiology of bile duct cancer is still unclear, and the relationship with gallstone disease is not as close as that of gallbladder cancer. Therefore, there is a lack of effective methods for primary prevention of bile duct cancer. The main focus is on the prevention and treatment of hepatobiliary stones and regular systematic health checkups. Patients with obstructive jaundice should be highly alert to the possibility of bile duct cancer when gallstone disease, hepatitis and cirrhosis are excluded. Based on detailed medical history and comprehensive physical examination, ultrasound, CT, PTC and ERCP examination should be done as early as possible for early detection, early diagnosis and early treatment.