Lower extremity venous thrombosis clinically refers to lower extremity deep vein thrombosis, and the treatment of lower extremity deep vein thrombosis should include the acute phase of lower extremity venous thrombosis itself, the prevention of pulmonary embolism, and the prevention and treatment of chronic post-thrombotic syndrome. Treatment includes general management, pharmacologic therapy, surgical therapy, and interventional therapy. The treatments for lower extremity deep vein thrombosis are as follows: 1. General treatment: bed rest, reduce activities; at the same time, lower extremity elevation, making the lower extremity higher than the heart level, improving venous return, reducing edema and pain. Compression stockings are suitable for thrombus time more than 2 weeks, the condition into the chronic phase. 2, drug therapy: including anticoagulant drugs, thrombolytic drugs and symptomatic drugs. Anticoagulants include heparin, low molecular heparin, warfarin and new anticoagulants. Thrombolytic drugs include urokinase, fibrinolytic enzyme, tissue-type fibrinogen activator (t-PA), etc. If there is serious pain and swelling, intravenous active drugs can be given for treatment. Peripheral type is better treated by anticoagulation and thrombolysis, and mixed type is poorly treated by medication, and ultimately deep vein thrombosis syndrome occurs due to the destruction of valves of traffic branch veins of the calf. Surgical treatment: i.e. incision and thrombectomy, which has certain risk and relatively high recurrence rate, and has been less applied in the clinic; primary central type can be operated within two days after the onset of the disease to take the thrombus, but many patients miss the chance when they visit the clinic, and the thrombus has been extended to the whole femoral vein section and adhered to the endothelium, so that the thrombus-taking effect is not good, and the chance of complete recanalization in the future is relatively small; although the function of the distal deep vein transportation branch is still good, but due to the destruction of the valves of the traffic branch of the calf, the effect of medication is poor. Although the function of the distal deep vein traffic branch is still good, due to the long-term poor venous return, the venous pressure increases, in addition to the swelling of the lower limbs, and finally appear deep vein thrombosis syndrome. Interventional therapy: endovascular treatment, including catheter thrombolytic therapy, catheter suction or comminution therapy. If deep vein thrombosis of lower limb is diagnosed, please go to regular hospital for treatment, and patients should not judge the medication by themselves.