Patients only feel coldness in the skin temperature of the affected limb, or mild numbness, and are easily fatigued after activity. The atherosclerotic plaque forms on the inner wall of the arterial vessels, and as the plaque increases and the lumen narrows, the patency of the pipeline is affected, and the blood flow to the lower extremity is reduced, and when the narrowing reaches a certain level or even completely blocked, the blood flow supplying the lower extremity cannot meet the needs, and the symptoms of lower extremity ischemia appear. Most patients suspected of having lower extremity atherosclerotic occlusive disease are recommended to go to the vascular surgery department of a regular hospital for a definite diagnosis. Usually, the specialist will take a detailed medical history and conduct a physical examination, such as pulse palpation of the extremities and abdominal and femoral-? Arterial auscultation is necessary for the diagnosis. The doctor will make a preliminary diagnosis of lower limb arteriosclerosis occlusive disease based on the strength or disappearance of the pulse and the presence of murmurs, as well as symptoms such as resting pain, abnormal sensation or numbness, and nutritional disorders, ulcers or gangrene of the limb tissues.