Interventional therapy is an emerging treatment method developed in recent years between surgical and medical treatment. It refers to the opening of tiny channels of a few millimeters in diameter in blood vessels and skin through percutaneous puncture routes or through the body’s original orifices, under the guidance of imaging equipment (angiography, CT, MR, B ultrasound) and with the combination of various operating techniques, inserting special guidewires, catheters or instruments into the lesion to diagnose and treat the lesion locally, or to perform tissue collection for cytological, bacteriological and biochemical examinations. Cytology, bacteriology and biochemical examination are performed. After more than 30 years of development, interventional therapy is now known as one of the three pillar disciplines along with surgery and internal medicine. It is a minimally invasive solution to diseases that were previously difficult to treat by medical and surgical means, and has been developing rapidly with its advantages of safety, quick results, exact efficacy, repeatability, and few complications, and is now recognized and accepted by the majority of medical workers and patients. The advantages of interventional therapy compared with medical treatment are: the drug can be directly applied to the lesion through the catheter, which not only can greatly improve the concentration of the drug at the lesion, but also can greatly reduce the dosage of the drug and reduce the side effects of the drug. 1, it does not require an incision to expose the lesion, generally only a few millimeters of skin incision, you can complete the treatment, epidermal damage is small, beautiful appearance. 2, Most patients only need local anesthesia, and for the advantages of internal treatment non-general anesthesia. 3.Small damage, fast recovery, satisfactory results, and little impact on normal body organs. For malignant tumors that are difficult to treat by medical and surgical methods, interventional therapy can limit the drugs to the lesion as much as possible, while reducing the side effects on the body and other organs. Since its introduction into China in the early 1980s, interventional therapy has rapidly established its important position in the field of modern medical diagnosis and treatment. In November 1996, the State Science Committee, the Ministry of Health and the State Administration of Medicine jointly held the “Seminar on Strategic Issues of Interventional Medicine in China”, which officially listed interventional therapy as the third major treatment discipline alongside medical and surgical therapies, and called it interventional medicine. With the continuous development of interventional medicine, this discipline, like internal medicine and surgery, is gradually subdivided into neurointerventional, cardiac interventional and digestive interventional departments. Gastrointestinal intervention refers to the clinical discipline that uses interventional methods to diagnose and treat diseases of the digestive system. It mainly treats various malignant tumors of the digestive system that are common and difficult to treat by medical and surgical methods, as well as vascular and biliary tract lesions.