Ovarian granulosa cell tumor is a kind of low-grade malignant tumor of ovary, which is also called mesenchymal stromal cell tumor of ovary. This kind of tumor can be cured by surgery in early stage, and this kind of tumor is very sensitive to chemotherapy. After surgery, if chemotherapy is used, the cure rate of early stage tumor can reach more than 90%, so it is timely to do surgical treatment. If the tumor reaches the middle or late stage, the cure rate can reach about 50% through surgery, radiotherapy or chemotherapy. Therefore, this kind of tumor can be cured by early detection and early treatment.