If a diabetic patient needs to take insulin every day, after standard treatment, the total life expectancy is not much different from that of a normal person if the blood glucose control reaches the standard state and there are no microvascular or macrovascular complications. If the blood sugar is not well controlled and there are obvious microvascular and macrovascular complications, the life expectancy is much less than that of normal people. Diabetic patients are prone to heart attack, brain infarction or diabetic foot gangrene caused by lower limb vascular disease, which seriously affects the quality of life of patients and leads to a shorter overall life expectancy. type 1 glucose patients need daily insulin injections, because poor blood sugar control will be combined with nephropathy and uremia, and many patients eventually die of uremia complicated by infection and heart failure, which will significantly shorten their life expectancy.