When blockage occurs in the arterial system of the lower extremities, the causes can be the following: 1, arterial thrombosis or embolism: such as thrombosis on the basis of atherosclerosis, heart or aortic thrombus falling down and blocking the arteries, this situation accounts for about 50% or more; 2, lower extremity arteriosclerosis occlusive disease: the process is irreversible; 3, arterial malignant tumor infiltrative or compressive growth, late can cause compression of the lumen, resulting in arterial obstruction. In the case of distal lumen blockage, the distal end is dealt with, i.e., removal of cardiac thrombus. In addition to getting rid of the locally blocked emboli, atherosclerotic occlusive disease requires antiplatelet and lipid-lowering drugs to slow down the process of atherosclerosis and prevent its reappearance in the distal phase. In case of external compression, it needs to be cleared by various means.