The biggest failure of ovarian cancer treatment is “not having surgery”. This shows the role of surgery in the treatment of ovarian cancer. Ovarian cancer surgery is called tumor cell reduction surgery, which is not a radical cure, but a reduction of tumor, and the more complete the elimination, the better. The so-called satisfactory tumor cell reduction is to achieve no tumor visible to the naked eye. The primary ovarian tumor can be very large or not so large, but metastatic tumors cover the abdominal and pelvic cavities and often have a lot of ascites. In general, the scope of ovarian cancer cytoreductive surgery includes total uterus with both adnexa, ovarian artery and vein ligation, large omentectomy, appendectomy, lymph node dissection of pelvic vessels and lymph node dissection of the para-abdominal aorta. If there are metastases in the intestine or other parts of the body, they are also removed as much as possible, including splenectomy, resection of tumors between liver compartments, partial intestinal resection, etc. Every effort is made to destroy the tumor so as to achieve satisfactory tumor cell reduction. Ovarian cancer surgery is a very difficult surgery in gynecological surgery, mainly 1. It is difficult to predict the difficulty of surgery before surgery, sometimes the tumor is everywhere in the open abdomen and bleeding is dangerous, so it may not be removed even with the best efforts. 2. It is also difficult to predict the scope of surgery, sometimes it involves intestinal surgery, liver and spleen surgery, bladder and ureter surgery, which requires teamwork to achieve the purpose of tumor reduction and elimination. 3. There are many surgical hurdles to overcome after surgery. Patients with tumor are of high morbidity age and will have many underlying diseases, postoperative bleeding hurdles, thrombosis hurdles, infection respiratory failure hurdles, etc. are all tricky issues. Therefore, surgery for ovarian cancer requires the joint efforts of doctors and patients, and the so-called “human effort” is very important for patients with ovarian cancer, which is a very dangerous malignant disease with a five-year survival rate of about 30%. For the doctor to fully understand the patient’s condition and formulate a suitable surgical plan. And the operation is fully prepared and closely monitored after surgery to reduce surgical complications.