Previously, the main purpose of inferior vena cava filters was to prevent pulmonary embolism, and its indications were patients with lower limb venous thrombosis and recurrent pulmonary embolism where anticoagulation was contraindicated. However, the traditional treatment of venous thrombosis has resulted in the incidence of post-venous thrombosis syndrome up to 35% or more, which greatly affects the patients with venous thrombosis. Some new literature and scholars have suggested that local thrombolytic therapy and early functional exercise for venous thrombosis can reduce the incidence of post-venous thrombosis syndrome, but these treatments often require the protection of a vena cava filter. The second role of vena cava filters and assistance in the treatment of venous thrombosis was first proposed in our center. Local thrombolysis and air pressure pump therapy combined with functional exercise after placement of a temporary filter can further reduce the incidence of post-venous thrombosis syndrome for patients.