Atherosclerotic occlusive disease (ASO) is a local manifestation of systemic atherosclerosis in the extremities. It is a degenerative and proliferative change in the intima and middle layers of the arteries, causing the vessel walls to harden, shrink, and lose elasticity, which leads to secondary thrombosis, resulting in progressive reduction or interruption of distal blood flow. The arteries of all extremities can be affected, but the lower extremities are the most common, often invading the superficial femoral artery, followed by the lower third of the abdominal aorta, the bifurcation of the abdominal aorta, and the proximal common iliac artery and femoral artery. Distal vascular involvement is more frequent in the anterior tibial artery than in the posterior tibial artery. Therefore, the incidence of lower limbs is higher than that of upper limbs, and the disease is more serious. In recent years, with the continuous improvement of people’s living standards and changes in dietary structure, the incidence of the disease has increased year by year and has become one of the common vascular diseases of the extremities.