How long a paralyzed old man can live depends on his condition.1. If only the limbs are paralyzed, everything else is normal, can eat normally, usually take oral medication to improve the circulation, to prevent the reoccurrence of massive cerebral infarction or cerebral hemorrhage, the patient can survive for a long time.2. Paralyzed combined with difficulty in eating, if there is choking on food, accidentally choking on food to the windpipe, can cause life-threatening problems, if necessary, we recommend gastric tube placement and nasal feeding fluid diet, the patient can also survive for a long time. If there is choking and coughing when eating food, if the food accidentally choked to the trachea, it can cause a life-threatening situation, if necessary, it is recommended to put in a gastric tube and nasal fluid diet, the patient can also survive for a long time. 3, paralysis combined with coma patients, the condition is more serious, at any time, there may be a life-threatening situation, the patient’s survival time is not too long.