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, not a cure, but a reduction of tumor, the more complete the elimination, the better. The so-called satisfactory tumor cell reduction is to achieve no tumor visible to the naked eye. In advanced ovarian cancer, there are tumors all over the abdominal and pelvic cavities. 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 among gynecological surgeries, mainly including: 1. it is difficult to predict the difficulty of surgery before surgery, sometimes there are tumors everywhere in the abdomen and bleeding is so dangerous that it may not be removed even with the best efforts. 2. 2. The scope of surgery is also difficult to predict, 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, a surgery for ovarian cancer requires the joint efforts of doctors and patients, so called “human effort”. Ovarian cancer is a very dangerous malignant disease, with a five-year survival rate of about 30%, and surgery is a very important treatment. For the doctor to fully understand the patient’s condition and formulate a suitable surgical plan. And the surgery is fully prepared and closely monitored after surgery to reduce surgical complications.