As a minimally invasive technique, vena cava filter implantation index has become one of the preferred treatment methods for VTE patients. Nowadays, interventional radiology has become the third largest clinical diagnosis and treatment means after medical treatment and surgical treatment, and is widely used in clinic. Pulmonary embolism is the most serious complication of deep venous thrombosis of lower limbs, and inferior vena cava filter is one of the most effective prevention methods. What is the vena cava filter for? Generally speaking, vena cava filter is an instrument used to prevent pulmonary embolism caused by deep venous thrombosis of lower limbs falling off and returning to the heart. This article will introduce the history of inferior vena cava filter.