Most patients with bile duct malignancy are already in the middle to late stage or progressive stage when they are discovered, and their survival time varies from half a year to one year, and the malignancy of bile duct cancer is very high, and it is also easy to have local infiltrative growth, and sometimes it is easy to have recurrence and metastasis after surgery. After surgery, if the patient’s condition allows, intravenous chemotherapy can be chosen to control the recurrence of the tumor, and most patients with bile duct cancer will have abnormal liver function, including increased transaminases and abnormal bilirubin, requiring long-term liver protection and symptomatic treatment. The bile ducts also need to be monitored for bile drainage, which may interfere with the function of the digestive system to a certain extent and cause prolonged diarrhea or abdominal pain.