How long a person with diabetes mellitus complicating cerebral infarction hemiplegia can live depends on a variety of factors such as age, changes in condition, concomitant diseases, etc. Each person’s condition is different, the prognosis is different, and the amount of time they will survive is different, there is no specific timeframe. The prognosis for patients with diabetes mellitus complicated by cerebral infarction hemiplegia is related to age, location of the cerebral infarction, changes in condition, and concomitant diseases. Recurrent diabetic cerebral infarction in the elderly is prone to impair cognitive function, which may be only mildly cognitively impaired in the early stage, and may develop into vascular dementia in severe cases. While treating cerebrovascular disease, risk factors for atherosclerosis such as blood glucose, blood lipids, blood pressure, blood viscosity, smoking and body weight should be strictly controlled in order to avoid or minimize further aggravation and recurrence of diabetic cerebrovascular disease. It is recommended that patients seek timely medical treatment, comprehensive assessment of the condition and standardized treatment.