Advanced epithelial ovarian cancer has a high recurrence rate, with five-year survival rates consistently around 30 percent. Even after surgical treatment and chemotherapy, the tumor will still come back again. The principles of treating recurrent ovarian cancer are: 1) to prolong the patient’s survival time, and 2) to improve the patient’s survival quality. Both are equally important. The treatment given to patients with recurrent ovarian cancer should consider both of these aspects. The treatment for recurrent ovarian cancer is still surgery, chemotherapy and radiotherapy. The time of tumor recurrence, the site of recurrence, and the general condition of the patient are all factors that determine whether surgery can be performed again. Therefore, surgical treatment should take into account the appellate factors and should be done only if it is expected to help prolong the patient’s life or improve the quality of survival. The risks of reoperation are generally higher than those of the initial surgery. Without the uterus and bilateral ovaries, reoperation is more of a surgical procedure involving the pelvic organs (rectum, bladder or spleen, liver, pancreas, etc.). The preoperative evaluation includes: 1) general physical and mental status score; 2) imaging; 3) serum tumor marker measurement; 4) assessment of surgical risk by relevant departments including anesthesia, surgery, blood bank, ICU, relevant internal medicine, etc. Chemotherapy is also the main treatment after recurrence of ovarian cancer. Usually, for patients who have undergone surgery again or do not receive surgery, chemotherapy will be evaluated to see if they can receive chemotherapy. 1. The choice of chemotherapy regimen, usually the first chemotherapy is effective, or the original regimen will be used. 2.Change of chemotherapy regimen is usually due to poor results of the original regimen or insurmountable side effects of chemotherapy. Whether it is surgery or chemotherapy, for recurrent ovarian epithelial cancer, it is very difficult to achieve a cure, and the goal is to prolong survival and improve life treatment. Usually, “the first surgery plus 6-8 courses of chemotherapy” will bring the tumor into remission for 3 years or less, some will recur in more than 3 years, some will recur in 1-3 years. In some cases, it takes more than 3 years for the tumor to recur, and in others, it recurs within 1-3 years. This is the worldwide course of recurrence of advanced ovarian cancer, which of course varies greatly among individuals.