How long a patient with severe cerebral infarction can live is related to the infarct area, the infarct site, and the treatment, and the patient’s complications in this process. 1, If the situation is all heavy, a patient with severe cerebral infarction will die 3-5 days after the onset, because the infarct site of the patient’s cerebral infarction will form brain edema at this time, which will lead to the formation of brain herniation in the patient, and the patient may enter death at any time because of brain herniation. 2. If the patient is not given debulking decompression at this stage, even if the debulking decompression is not effective, the patient will still enter death at any time due to brain herniation. 3. Severe cerebral infarction refers to large cerebral infarction or large infarction in the brain stem, such as in the medulla oblongata, and the patient may have combined inflammatory complications, such as stress gastric ulcer, aspiration pneumonia and other problems These can affect the course of the patient’s disease and lead to an aggravation of the patient’s condition.