Blood pressure of 150mmHg systolic and 70mmHg diastolic is called critical simple systolic hypertension, which is usually seen in the elderly with atrophied arterial muscle layer and reduced elasticity, but also in some diseases with increased blood discharge, such as aortic valve insufficiency, arterial catheterization, hyperthyroidism, arteriovenous fistulas, severe anemia, etc. The main treatment is to treat the primary disease. For simple systolic hypertension caused by aortic valve insufficiency, arterial duct failure, hyperthyroidism, arteriovenous fistula, and severe anemia, the main treatment is to treat the primary disease, and at the same time, to provide emergency treatment for excessive systolic blood pressure. After the primary disease is cured, blood pressure monitoring should be carried out, and if hypertension still exists, drug treatment is needed. As for senile systolic hypertension, the incidence of cardiovascular accidents is higher than that of other types of hypertension, so attention must be paid to it. Treatment includes lifestyle modification and medication. Lifestyle adjustment mainly includes strengthening exercise, weight control, low-salt diet, and quitting smoking and drinking. Drug treatment should be single dose, starting from a small dose and adjusting the dose according to the change of blood pressure. If there is any discomfort, consult a doctor in time and follow the doctor’s instructions.