There is no clear research to show how long diabetes can live, if you follow the doctor’s instructions to standardize the treatment of diabetic patients can not even affect the survival period; if not standardized treatment complications of diabetic nephropathy, cardiovascular disease will seriously affect the patient’s prognosis, may shorten the survival period. Diagnosed with diabetes should be diabetic diet, moderate exercise, and under the guidance of a doctor to standardize the use of glucose-lowering drugs such as gliclazide, metformin and other treatments or injections of insulin therapy, blood glucose control within a reasonable range. Active control of blood glucose can effectively prevent complications, and the survival of patients in such cases will be long, even without affecting survival. Patients with diabetes mellitus who are not detected early and treated aggressively and standardized will lead to long-term poor glycemic control, which may induce diabetic nephropathy, diabetic cardiovascular lesions, diabetic ketoacidosis and other serious complications, then it may shorten the survival period, or even threaten life. Patients diagnosed with diabetes mellitus should actively cooperate with their doctors in treatment and maintain a healthy lifestyle, all of which can help improve the prognosis.