The signs of natural old age death in the elderly generally do not need to be measured in time. Signs of dying in the elderly mainly show impaired consciousness, changes in pupils, changes in vital signs, and weakening of physiological reflexes. Signs of dying in the elderly still need to be judged by a doctor based on symptoms and signs. 1. Obstructed consciousness: the elderly will be drowsy before death, and this state will gradually aggravate, and ultimately appear sleepy, coma, death. 2. Pupil changes: the pupils of both sides of the dying old man will be unequal in size and lack of vigor, and eventually the pupils will gradually dilate. 3. Changes in vital signs: blood pressure will gradually drop. Pulse, respiration and heart rate will gradually slow down. 4. Physiological reflexes: including pupil light reflex and corneal reflex.