The indicator of bilirubin can be lowered after stenting for bile duct cancer. In cholangiocarcinoma patients, due to the gradual enlargement of tumor compressing bile ducts, a large amount of bile is stagnated in bile ducts, the pressure of bile ducts dilatation rises, bile enters into the bloodstream, which causes an increase of bilirubin in the bloodstream and jaundice is produced. After stent intervention, the symptoms of compression can be relieved, and the obstructive jaundice can be relieved, and the bilirubin index in liver function test can be significantly reduced. However, stent intervention only temporarily relieves the symptoms of obstruction, and has no obvious therapeutic effect on the tumor itself, so it has little effect on the tumor marker indexes. It is necessary to further treat the bile duct cancer tumor itself, and according to the patient’s condition, surgery, radiotherapy, chemotherapy and other therapeutic measures can be adopted. After stenting for bile duct cancer, bilirubin index can be lowered, jaundice symptoms can be improved, and patients’ quality of life can be improved. However, patients need to actively go to the hospital at the same time to receive other standardized treatments for bile duct cancer.