Abstract Objective: To research the safety and effect of the simultaneous abdominal aorta balloon occlusion without radiation exposure during caesarean section in placenta percreta patients. Design: A retrospective case study. Setting: A class A tertiary comprehensive hospital in Beijing of China. Population or Sample: 28 pregnant women from September 1st, 2015, to January 31st, 2019 Methods: The medical records of 28 patients with placenta percreta, who undertook the simultaneous abdominal aortic balloon occlusion without radiation exposure during caesarean section, were retrospective studied. Main Outcome Measures: The intra-operative blood loss, transfusion requirements, hysterectomy rate, the duration of operation, length of Intensive Care Unit time and postoperative hospital stay. Results: The technical success rate was 100%. The amount of blood loss was 600 - 6500 (3094 ± 1502) ml. The duration of operation was 123 - 488 (285 ± 102) min. The mean Intensive Care Unit time and postoperative hospital stay were 2.0 (1.0 - 2.8) days and 7.0 (7.0 - 9.0) days respectively. Hysterectomy was carried out in 12 (42.9%) cases. No maternal and neonatal deaths. The complication included 7 cases of local thrombosis of right femoral artery. Thrombectomy was successfully performed through the femoral artery incision on the operating table simultaneously. There was no other complication. Conclusions: The simultaneous abdominal aorta balloon occlusion without radiation exposure during caesarean section in placenta percreta patients is a safe and effective procedure for hemorrhage control. It is an easy-to-implement procedure by a well-trained surgeon which performed in the general operation room.