Patients with stage 3c ovarian cancer have a five-year survival rate of about 20% to 30% after treatment. Ovarian cancer is a common malignant tumor of female reproductive system, which can be caused by various factors such as hormone level, heredity, etc. Stage 3c represents the occurrence of extra-pelvic peritoneal metastasis, with the largest diameter of tumor ≥2cm, with or without retroperitoneal lymph node metastasis. In this period, it is judged whether tumor reduction surgery is feasible according to the specific conditions of patients, and after surgery, it is supplemented with radiotherapy and other therapies. After active treatment, patients with ovarian cancer stage 3c can obtain a five-year survival rate of about 20%~30%. Patients should pay attention to regular review after surgery and ensure nutrition in daily diet to prolong the survival period.