Objective To investigate the therapeutic efficacy of Aegisy retrievable filter in inferior vena cava interventional treatment for acute deep venous thrombosis of lower extremity. Methods Acute or sub acute unilateral lower extremity deep vein thrombosis ( deep vein thrombosis, DVT) patients in our hospital were selected, and Aegisy filter was put into the inferior vena cava through the femoral, and thrombolytic therapy was carried out in the next day. Limb conditions was observation after 10 to 15 days, confirmed by vascular ultrasound and angiography of lower limb vein after no fresh or free thrombus. The filter was removed with protector, anticoagulant therapy after review the venography of lower limb postoperative. Results All Aegisy filter were put into patients, and there were no obvious forward jumping and drawing back occurred during the release of the filters, and all Aegisy filter had a better position. Placement of a filter everage time was (16. 8 ± 1. 3) days, 89 cases were successfully recovery filter. The effct of Aegisy filter on the patients with lower extremity deep venous thrombosis after treatment is obvious effect, no pain, and no symptom of pulmonary embolism. Conclusion Aegisy retrievable inferior vena cava filter has many advantages in clinical use. The filter can be placed to the scheduled position accurately,and it is very powerful in captu-ring the thrombus,it can be hold in the inferior vona cava for long time before it is planed to be retrieved,and its retrieval success is very high. Moreover,with high technieal successful rate the implantation of Aegisy retrievable inferior vena cava filter is very safe and effective for the interventional treatment of acute deep venous thrombosis of lower extremity.