The causes of high blood pressure after surgery are mainly in the following aspects: First, pain and emotional tension, especially local anesthesia and lumbar anesthesia surgery, the patient is always in a state of wakefulness and stress, pain and tension will stimulate sympathetic nerve excitation, catecholamines, adrenaline and other vasoconstrictor-activated substances secretion, which leads to elevated blood pressure. Second, intraoperative and postoperative transfusion of large amounts of fluid, so that the blood volume increases, resulting in increased blood pressure. Third, general anesthesia patients postoperative intolerance of tracheal intubation, resulting in man-machine confrontation, can also cause elevated blood pressure. Postoperative patients with elevated blood pressure should be actively given analgesia, sedation, reasonable use of antihypertensive drugs, while actively psychological counseling.