The use of double antibiotics after aortic surgery needs to be judged in the context of the patient’s medical condition. It is needed if there is a possibility of blockage after surgery and not needed if the risk of blockage is low. 1. If the patient’s aortic lumen is narrow and blood flow is slow. Even after aortic surgery, there is still a risk of re-occlusion. Therefore, a double antibiotic is needed to prevent the blood from clumping together and forming a thrombus to block the aorta. 2. No need to use double antibiotic: If the patient’s aortic lumen is wide and the blood flow rate is fast. After aortic surgery, the risk of re-occlusion is not likely to occur, and the use of double antibiotic may not be needed. Therefore, after aortic surgery, it is best to review regularly, dynamically observe the development of the disease, and strictly follow the doctor’s instructions for postoperative treatment to prevent the deterioration of the disease.