Biliary particle stenting is an interventional procedure usually applied to bile duct cancer, pancreatic head cancer or liver cancer. The surgical methods mainly include endoscopic biliary stent implantation and radiological intervention with bile duct puncture and placement of biliary stent. When patients suffering from malignant obstructive diseases of biliary tract such as bile duct cancer or pancreatic head cancer cannot be treated surgically due to certain factors, biliary particle stent implantation can usually be used to improve the quality of life of the patients or even prolong their survival period. Secondly, in the course of liver cancer treatment, biliary particle stent implantation can not only dredge the biliary tract, but also control the growth of tumor, and it can also effectively avoid secondary obstruction. Patients with the above mentioned diseases can undergo biliary particle stent implantation under the evaluation of specialists in order to prolong their survival.