The danger period for patients with cerebral hemorrhage drainage surgery is usually 24-48 hours after surgery, i.e. 1-2 days after surgery. This period requires close observation of the patient’s consciousness, pupils, and limb activities, which can indirectly reflect the recovery of patients with cerebral hemorrhage. Close attention should also be paid to observe the patency of the patient’s head drainage tube and the color of the drainage fluid. Patients at risk should undergo dynamic review of head CT, and it is recommended to review CT every day or every other day to observe the intracranial hematoma. For patients with cerebral hemorrhage in the danger period, the biggest problem is the enlarged hemorrhage and postoperative rebleeding. CT review is especially important when the patient is in an unstable state within two days. Once the hematoma is found to be enlarged during the danger period, another surgery is needed to remove the hematoma. In addition, extra attention needs to be paid to patients with cerebral hemorrhage in the danger period. Although the surgery is successful, the patient suddenly develops big problems, which may be due to the lack of timely observation and review, so patients in the danger period should be closely observed and treated.