Malignant obstructive jaundice is caused by various malignant tumors that narrow or occlude the bile ducts at different sites. The etiology of malignant obstructive jaundice is mostly due to cholangiocarcinoma, pancreatic head pot belly cancer and primary liver cancer. For patients who cannot be surgically resected, biliary drainage and biliary stent placement have become the first choice for the non-surgical treatment of malignant obstructive jaundice, but these methods can only relieve the symptoms of jaundice and cannot treat the tumor. Statistical data show that 50% of patients will experience reocclusion in the stent within 6 months, and that patients’ liver and kidney function is poor after long-term antitumor therapy. Although many methods have been tried clinically to improve the long-term patency of biliary stents, such as overlapping stents and photodynamic therapy, little progress has been made, and in this case, a new technique is especially needed to improve the patency of stents. Thermal ablation is a new technology for minimally invasive treatment of tumors that has emerged in recent years and has gradually matured in the treatment of solid tumors in liver organs and other parts of the body, but there is relatively little clinical experience in the treatment of biliary cavity malignancies and intra-stent obstruction. In recent years, intracavitary biliary radiofrequency ablation as a new technology has proved its effectiveness and safety in treating malignant biliary obstruction. Professor Xu Linfeng of our department actively introduced this technology into our hospital after special study on the use and specific operation of biliary radiofrequency ablation catheter. The procedure is performed through the bile duct of the liver via skin puncture under the X-ray guidance of DSA, and a hole is drilled in the tumor tissue blocking the bile duct, and a bipolar radiofrequency ablation catheter is introduced at the location of malignant tumor growth in the bile duct lumen. The biliary tract stent implantation can achieve the purpose of long-term bile duct unblocking. This treatment is safe, minimally invasive and with few complications, which not only directly kills malignant tumor cells, effectively relieves biliary obstruction and reduces the risk of recurrence of biliary obstruction, but also protects the patient’s liver function and the normal physiological channel of bile drainage to the greatest extent, the patient’s jaundice all quickly subsides after surgery, and the total serum bilirubin significantly decreases. In addition, the quality of survival of patients is improved and the survival time is significantly prolonged. At present, our department has accumulated a number of clinical cases of malignant obstructive jaundice treated with biliary radiofrequency ablation and biliary stent implantation, and one of the patients has been followed up for 1 year. Typical case presentation (PPT): A 70-year-old female with “yellowish coloration for more than one month and epigastric distension and pain for one week” was admitted to the hospital with a clinical diagnosis of hepatoportal cholangiocarcinoma and obstructive jaundice, and was first admitted to our surgery department. The above picture shows the biliary tumor lesion after bilateral biliary drainage. On the third day after surgery, the patient’s bilateral biliary drains were removed, and there was no obvious trauma on the appearance of the abdomen.