Surgery for retroperitoneal tumor with inferior vena cava aneurysm embolism is not only necessary, but has long been promoted and developed with the skilled cooperation of our urology, cardiac surgery, general surgery and anesthesiology departments. This group of cases at our hospital has the highest number, best perioperative safety and longest postoperative survival rate in the country, and articles related to surgical technique, perioperative management and prognosis have been published one after another. Although the procedure has become increasingly mature and perfect, there are still unsatisfactory aspects such as long combined thoracoabdominal incision, large trauma, and obvious impact on postoperative thoracic and abdominal breathing. Recently, by continuing to dig deeper and trying to ensure safety and success, the blogger has improved the procedure accordingly, making it possible to remove the posterior vena cava aneurysm embolus of the liver in a complete and clean manner even in cases where the length is under the diaphragm and the posterior vena cava embolus of the liver is assisted by establishing extracorporeal circulation through a small incision (no chest opening). This approach allows the establishment of extracorporeal circulation only through the subclavian artery and an adequately exposed vena cava, avoiding the need for open-heart surgery. The total operative time is short, the trauma is minimal, and the patient has few postoperative pulmonary complications, no chest drains, and a rapid recovery. We have four successful cases and will report our experience to our colleagues in the next few days in order to promote and serve our patients as soon as possible.