Hepatocellular carcinoma and cholangiocarcinoma are common malignant tumors, mostly seen in middle-aged and elderly people, with insidious onset and lack of specific clinical manifestations, and the tumors are often bile duct invasive, leading to obstructive jaundice. Cancerous obstructive jaundice seriously affects the liver function and quality of life of patients, and the prognosis is very poor, so interventional therapy becomes the first choice for patients, which can release the obstruction of the bile duct and can target the tumor for local treatment. Radiofrequency ablation of bile duct tumor and common bile duct tumor: Through percutaneous transhepatic puncture technique, radiofrequency catheter is delivered to the site of cancerous obstruction of bile duct by establishing a channel of only 2mm in diameter, which can thermally ablate the cancer and release the obstruction and treat the tumor at the same time. Similarly, through interventional techniques, stents can be implanted at the site of biliary tract obstruction to relieve the obstruction, such as the implantation of laminated stents, which can prevent the cancer from growing through the mesh of ordinary bare stents and causing biliary tract obstruction again, and increase the patency rate of stents. If the stent with radioactive particles is implanted, the stent patency rate can be increased and the local cancer can be killed by radioactivity, which can play a local treatment role. Interventional therapy is now the first-line treatment option for hepatobiliary system tumors, especially for patients who are inoperable in the middle and late stages, it has become their life-saver, and the comprehensive treatment effect of minimally invasive techniques such as radiofrequency therapy and stent implantation therapy combined with medical treatment is better, which can prolong patients’ survival and improve their quality of life.