Cerebrovascular bypass surgery is usually about 3 days after the danger period, the risk is higher in the 3 days after surgery, there is the possibility of embolism, anastomosis cracking and excessive irrigation caused by the surgery, patients need to stay in bed strictly and control the blood pressure. Patients undergoing cerebrovascular bypass surgery are prone to cerebral hemorrhage as well as cerebral embolism within 3 days of surgery, both of which are life-threatening and require strict prevention and active improvement of intracranial circulation to avoid hypercoagulability of blood due to poor circulation. In addition, high blood pressure due to postoperative stress can easily cause cerebral hemorrhage, and strict control of blood pressure is needed after surgery to avoid critical postoperative complications. For patients after cerebrovascular bypass surgery need to be strictly bedridden, standardized treatment under the guidance of doctors, standardized postoperative care to avoid deterioration of the situation.