The active protection of diabetic foot is the key to improve the quality of life. The following points should be noted: 1, active treatment of diabetes, stable blood sugar: control of diabetes, stable blood sugar is the basis for the prevention and control of its complications, health education for diabetic patients so that they understand the relevant knowledge in order to actively cooperate with treatment. 2, prevention and control of atherosclerosis: Diabetic patients are prone to atherosclerosis, which is the basis for the occurrence of limb ischemia in diabetic patients. Through active dietary control, moderate physical activity with drug therapy can help prevent its occurrence and development. 3. Avoid limb trauma: As a physician, you should remind your patients that a diabetic patient may lose a limb or even his life because of a pair of unsuitable shoes. Patients should always be alert to prevent any kind of trauma to the limb, including very minor burns. Even skin trauma that is insignificant to a normal person should be taken seriously and treated aggressively and correctly to prevent complications of infection that could lead to serious consequences. In addition, strict prohibition of smoking and active prevention and treatment of microvascular and neurological lesions are equally important.