It is impossible to determine how many years hemiplegia usually lasts, and it needs to be judged according to the patient’s condition. Mild hemiplegia usually does not affect life expectancy. Incomplete paralysis is related to medication prevention, control of underlying diseases, etc. Total paralysis may result in death due to aspiration pneumonia. 1. Mild paralysis: Some people with milder degree of hemiplegia, hypertension, diabetes, hyperlipidemia and other underlying diseases, well controlled, no risk factors, active treatment, can improve and reduce the recurrence of cerebral infarction. Those with less severe hemiplegia have less impact on their lives and can basically take care of themselves. With good secondary prevention, the risk can be reduced to that of a normal person, and the life expectancy and probability of risk are the same as that of a normal person and will not be affected. 2. Incomplete paralysis: hemiplegic patients are left with disabilities, their quality of life is affected, they cannot take care of themselves and may die due to accidents. Survival time is uncertain and is related to a variety of circumstances such as how well family members take care of the patient, the degree of active rehabilitation, the use of medication for prevention, and the control of underlying diseases. 3. Complete paralysis: paralyzed people can not move their limbs at all, and they are prone to severe swallowing difficulties and choking on drinking water, which can easily lead to complications of aspiration pneumonia, thus causing death. Hemiplegic patients need to be treated and rehabilitated under the guidance of a doctor in order to improve the quality of their survival.