The incidence of hypertension in the elderly is related to the decrease of central function of blood pressure regulation and the increase of the stiffness of the sclerosing blood vessel wall. The clinical manifestations are: ① The systolic blood pressure increases, and the systolic blood pressure increases with age; ②The pulse pressure is large, and the elderly patients with hypertension simply account for 60% of systolic hypertension. The greater the pulse pressure, the greater the risk of death