Ovarian cancer is easy to metastasize and spread widely. About 3/4 of patients are already in advanced stage when they are diagnosed, and the 5-year survival rate still hovers at about 30% after comprehensive treatment mainly by surgery. In addition to the difficulty of early diagnosis, recurrence after treatment is an important reason. About 50% to 80% of patients who have achieved clinical cure will have recurrence in the near or distant future after stopping treatment. To reduce recurrence of ovarian cancer, the following points should be noted: 1. Thorough removal of lesions: The primary tumor and the visible pelvic and abdominal metastases should be removed as much as possible during ovarian cancer surgery, or the residual cancer lesions should be less than 2.0~1.5 cm in diameter. For epithelial cancer, the greater omentum and appendix should also be removed. The treatment of intestinal metastases is an important part of ovarian cancer surgery and one of the deciding factors affecting the prognosis. For superficially infiltrated cancer masses, resection is feasible; while for larger masses or deeper infiltration, intestinal resection and anastomosis should be performed without palliation. If the remaining rectum is still 8-10 cm after resection of sigmoid colon and rectum, anastomosis should be performed as much as possible; if it is difficult to anastomose or the tissue at the severed end is unhealthy, colostomy should be performed. An end-to-end or end-to-side anastomosis can be completed with an intestinal anastomosis clutch at the time of low rectal resection, which is fast, effective, and can eliminate the pain of fistula. The lymphatic metastasis rate of ovarian cancer is more than 50%, and most of the experience nowadays has tended to the lymph node removal as one of the components of tumor cytoreductive surgery. 2.Adhere to long-term chemotherapy: chemotherapy for ovarian cancer should be longer-term and continuous. Especially for those with advanced stage and surgery without resection. The drug schedule is: the first year after surgery: one course of treatment per month; the second year: one course of treatment per month; the third year: one course of treatment every 6 months; the fourth to fifth year: one course of treatment every 6 months; more oral drugs are used instead. After 5 years, no sign of recurrence can be stopped, and try to avoid stopping chemotherapy in the middle, stopping chemotherapy in the middle can increase the possibility of recurrence of ovarian malignant tumor. 3.Chinese medicine adjuvant therapy: Chinese medicine believes that cancer is caused by deficiency of righteousness, stagnation of qi, phlegm and blood stasis over time, and Chinese medicine believes that the treatment of cancer should be based on the principle of “softening and dispersing”.