There is no specific data on how long one can live after a diabetic foot amputation, but if it is treated actively and effectively, it is generally no different from normal people. It should be judged according to the glycemic control, the progress of complications and the degree of amputation, as follows: 1. Blood glucose control: If the blood glucose control is poor, blood glucose fluctuation can easily cause the progression of complications, further damage to blood vessels, nerves, kidneys, etc., which may cause acute complications of diabetes mellitus, such as diabetic ketoacidosis and diabetic hyperosmolar coma, or even life-threatening. 2. Progression of complications: the occurrence of diabetic foot, there is usually a combination of diabetic neuropathy or diabetic microangiopathy, diabetic nephropathy may occur, causing renal failure, or diabetic retinopathy causing blindness. Severe diabetic macrovascular disease may occur causing myocardial infarction or cerebral infarction, all of the above diseases may shorten the survival rate of patients. 3. Degree of amputation: If only the toe or the front end of the foot is amputated, this kind of small amputation will have less impact on the person, and the survival time is relatively long. If the amputation is above the ankle joint, it is a major amputation, which has a greater impact on people and shortens the survival time. Diabetic foot should be treated in a timely manner and reviewed regularly after amputation.