Postoperative anemia after aortic dissection type A needs to identify the cause of anemia and treat the cause; postoperative anemia after aortic dissection type A may be caused by intraoperative bleeding, infection and other complications, which need to be treated according to the cause. 1. Intraoperative blood loss: if the patient’s postoperative anemia is caused by intraoperative blood loss, then according to the degree of anemia, blood transfusion can be given to treat, such as moderate-to-severe anemia, hemoglobin is less than or equal to 70g/L, blood transfusion treatment is needed, and if you consider the postoperative hemorrhage, it may be necessary to reopen the surgery for checking and stopping the hemorrhage. 2. Postoperative infection: Postoperative anemia after aortic dissection type A may also be caused by postoperative infection, nutritional anemia due to excessive loss of nutrients, if the hemoglobin is less than or equal to 70g/L, blood transfusion is also required, if the anemia is mild, it can be treated by strengthening the nutrition and supplementing with iron, vitamin B12, folic acid and so on. Postoperative anemia after aortic dissection type A should be taken seriously, especially need to be alert to complications such as bleeding from the surgical site or bleeding from the incision, it is recommended to pay close attention to it, and the patient should seek medical treatment in time.