Fever during postoperative recovery period of cholangiocarcinoma is generally categorized into short-term fever and long-term fever, according to the cause of fever, the treatments will be different, it is recommended to consult doctor for diagnosis in time. 1. Short-term postoperative fever: it is mainly caused by lung infection or biliary fistula. Postoperative lung infection can be treated with anti-infective drugs under doctor’s guidance, and if it is caused by biliary fistula, it is necessary to strengthen the local drainage, and may even need to be operated again. 2. Long-term postoperative fever: it may be caused by bile reflux or tumor recurrence. After bile duct surgery, due to the narrowing of the bile-intestinal anastomosis scar, it is easy to get infected after bile reflux, and the patient has liver function abnormality while having fever, so he needs anti-infective and symptomatic antipyretic treatment, and he needs to be operated again for multiple infections. It is recommended that patients do not take it lightly, actively cooperate with medical personnel, carry out appropriate rehabilitation treatment, get out of bed more to promote the recovery of gastrointestinal function, which is conducive to promoting the healing of the surgical incision, in order to better enable the body to recover.