Patients with cystic dilatation of bile ducts, primary sclerosing cholangitis and other diseases closely related to cholangiocarcinoma should be followed up and reviewed regularly; 2. Eating more vegetables and fruits rich in vitamin A and vitamin C, fish and seafood can help to clear bile and dissolve stones. 3.Living a regular life, paying attention to the combination of work and rest, regularly participating in sports activities, eating breakfast on time, avoiding gaining weight and reducing the number of pregnancies are also very important preventive measures. 4.The development of cholangiocarcinoma has a certain relationship with the structure and way of diet, therefore, a reasonable cholangiocarcinoma diet is an important guarantee for treatment and recovery. Due to the obstacle of bile excretion, digestion and absorption are affected, especially fatty food is not easy to digest, so clinically, symptoms such as dullness, less food, abdominal distension and nausea after eating are common. Therefore, we should choose foods that can be easily digested and absorbed, eat more fresh vegetables and fruits, do not eat or eat less oil and high-fat foods, forbid eating greasy diet when jaundice appears, ensure sufficient fiber intake every day, prohibit alcohol and quit smoking, adjust total calories to make it balanced depending on physical activities, and consciously choose some foods with auxiliary anti-cancer effects, such as nori, carrots, shiitake mushrooms, asparagus, Brassica, tomatoes. The diet of bile duct cancer is meant to improve eating habits and cooking methods, and to keep a happy mood when eating.