Insulin is an important method for diabetic patients to control blood sugar, but insulin has no relationship with the life expectancy of diabetic patients, and insulin does not affect the life expectancy of diabetic patients, so there is no specific time for how many years diabetic patients can live with insulin. Diabetic patients can live with the disease for a long time as long as they can control blood sugar well for a long time, avoid acute complications and delay the generation and development of various chronic complications. Insulin control of blood sugar is mainly applied to type 1 diabetes. Type 2 diabetes that is not controlled by oral hypoglycemic drugs or combined with acute and chronic type 2 diabetes, as well as perioperative diabetes and gestational diabetes in diabetic patients, also need insulin treatment. The main causes that affect the lives of diabetic patients are acute complications of diabetes, such as diabetic ketoacidosis and hyperosmolar coma. Chronic complications of diabetes, such as coronary artery disease, angina pectoris, myocardial infarction, cerebral infarction, diabetic nephropathy, renal insufficiency, and even uremia, can affect the life expectancy of patients, but insulin does not affect the life expectancy of patients.