Diabetic foot is a common chronic disabling complication in diabetic patients, with an incidence of about 2.8% to 14.5% in elderly diabetic patients. The main symptoms of diabetic foot are lower limb pain and skin ulcers. Amputations due to diabetic lower limb vasculopathy are 5 to 10 times higher than in non-diabetic patients. Therefore, it is of great social importance to pay attention to the prevention and treatment of diabetic foot and to actively save the limbs. The early symptoms of diabetic foot are: itching of the skin of both feet, fear of cold, white or purple skin, tingling at the extremities, numbness, dullness or loss of sensation, and sudden pain in the lower limbs when walking (intermittent claudication). Further changes in the disease can appear resting pain, that is, pain in the lower limbs even at rest, and even sleepless nights. At the end of the disease, ulceration and necrosis are formed on the foot, and the wound does not heal for a long time. The above disease is mainly due to the disorder of sugar, fat and protein metabolism in diabetic patients, and the thickening of the intima and calcification of the intima is accelerated, and this degenerative change is about 10-15 years earlier than that of normal people, resulting in a decrease in vasodilatation ability. Plaque formation can be seen in the walls of the blood vessels where the lesions occur, and there are lipid deposits such as cholesterol in the plaques, which narrow and block the blood vessels, resulting in impaired blood circulation and tissue hypoxia. In addition, abnormalities in the coagulation system of diabetic patients are also important causes. As platelet aggregation force is hyperactive in diabetic patients, the deformation ability of red blood cells is reduced, which easily forms thrombus and causes tissue ischemia. Therefore, the main factor causing tissue necrosis in the diabetic foot is inadequate blood supply to the arteries of the limb. Generally, clinical ischemic symptoms are seen when the blood vessels are narrowed to 3/4 of their diameter. During this rather long period of time, the patient himself usually does not care much, and by the time the symptoms worsen, the foot is already in advanced stage, with gangrenous foot death, and general treatment is hardly effective, and the patient will have to undergo amputation in order to save his life. Therefore, early detection and early treatment is quite important. The symptoms of early localized ischemia of the lower limbs are mainly vascular intermittent claudication, which is characterized by the following manifestations: . Symptoms appear only when walking and disappear rapidly (usually within 5 minutes) after stopping walking, and the same symptoms occur with the same walking. An experienced clinician can analyze the possibility of vascular disease from the patient’s initial history and some non-invasive clinical examination, then arteriography to evaluate the disease process, determine the area of involvement and the degree of obstruction of blood flow, and use this to develop appropriate treatment plans, such as physical therapy, medication and surgery. Diabetic patients are prone to peripheral neuritis, and their low sensitivity to pain makes them vulnerable to injury, and even a small wound can lead to an ulcer that is difficult to heal, so it is important for diabetic patients to take care of their feet. Check the feet daily for blisters, redness and swelling and broken skin; wash the feet daily to keep the toes dry and prevent mold infection; apply emollients such as petroleum jelly daily to prevent dry and cracked feet; do not use hot water bags or electric blankets for warmth; do not cut calluses and corns, trim toenails not too short, and do not walk barefoot to avoid injury. The main purpose of diabetic foot medication is to improve circulation in the lower limbs. Commonly used drugs include enteric aspirin, compound danshen tablets and reserpine to reduce blood viscosity and platelet aggregation; pepeda, pancreatic kinase releasing enzyme and hexoketone cocaine to dilate blood vessels and improve microcirculation. In addition, smoking cessation is required to maintain the therapeutic effect. The surgical treatment of diabetic foot mainly includes angioplasty and arterial reconstruction. Angioplasty is mainly performed through minimally invasive interventional methods by inserting a balloon catheter to dilate the narrowed blood vessels, causing the intima to tear and remodel, increasing vascular flow and improving distal blood supply. Arterial reconstruction is a procedure to restore blood flow to the ischemic tissues of the distal extremity by bypassing the ischemic segment with an autologous or artificial vessel, also known as a “bypass” procedure. Usually, diabetic patients are at greater risk than the average patient in vascular surgery, but for patients with fairly severe disease, angioplasty and arterial reconstruction are no less effective than for non-diabetic patients of equal severity.