Interventional therapy is a kind of minimally invasive treatment using modern high-tech means, which is guided by the fluoroscopy of digital subtractor and applies catheter technology to deliver therapeutic substances into the local lesion for effective treatment, therefore, interventional therapy has the characteristics of small damage, repeatability, accurate positioning, high efficacy, fast results and few complications. Interventional radiology is an emerging discipline that integrates medical imaging and clinical therapeutics, and involves the diagnosis and treatment of many systems such as digestive, respiratory, cardiovascular, neurological, urological, gynecological and obstetric diseases. At present, interventional therapy has become one of the main means of clinical treatment in modern medicine, and is the third major treatment method developed after internal medicine and surgery, solving the problems that cannot be solved by internal medicine and surgery. The main types of diseases are: 1. Non-vascular diseases: internal and external drainage or internal stent placement for obstructive jaundice (biliary obstruction) caused by benign and malignant tumors; balloon dilation for pancreatic dystrophy. 2.Vascular diseases: Thrombolysis or endovascular stent placement for arterial stenosis and obstruction caused by various reasons, endovascular stent placement for aortitis, renal artery stenosis, traumatic stenosis, Bu-plus syndrome, arterial entrapment; endovascular overlay stent placement or embolization for aneurysm; embolization for arteriovenous malformation. 3, bleeding disease: traumatic bleeding such as: liver and spleen rupture, kidney injury, pelvic bleeding, gastrointestinal bleeding drug perfusion or embolization treatment; hemoptysis bronchial artery embolization treatment; in order to reduce intraoperative bleeding preoperative resection lesion blood supply artery embolization treatment. 4, tumor diseases: such as liver cancer, hepatic hemangioma, kidney cancer, pancreatic cancer, pelvic tumor, bone tumor drug infusion and embolization treatment, as well as microwave ablation, radiofrequency ablation, radioactive particle implantation of some tumors. 5. Reproductive system diseases: such as micro-catheter and micro-conductor wire recanalization treatment for female infertility caused by tubal stenosis; embolization treatment for uterine fibroids and adenomyosis; drug infusion and embolization treatment for ectopic pregnancy.