The blood pressure standard for 81 year olds will be relaxed, as long as the systolic blood pressure of 81 year olds is below 150 mmHg, and the diastolic blood pressure should not be lower than 60 mmHg to prevent the relative insufficiency of coronary artery supply. 81 year olds will not require too low blood pressure, because too low blood pressure can easily lead to insufficient blood supply to the cerebral arteries, and if there is cerebrovascular disease, the blood pressure should be prevented from decreasing. The lowering of diastolic blood pressure in elderly people over 81 years old is mainly due to severe atherosclerosis, and the lowering of diastolic blood pressure due to severe atherosclerosis must be controlled.