Ovarian tumors are common tumors of female genitalia and have various natures and forms, such as single or mixed, unilateral or bilateral, cystic or parenchymal, benign or malignant, with cystic being the most common. The benignity and malignancy of the tumor can be clarified clinically by the patient’s course, physical signs, and adjuvant examinations. 1. Course of disease: benign tumors have a long course and increase gradually; malignant tumors increase rapidly within a short period of time. 2. Signs: benign tumor masses are mostly unilateral, movable, with smooth surface; malignant tumor masses are mostly bilateral, fixed and immobile, with uneven surface and nodular shape. (2) Tumor markers: such as CA125, CA199, CEA, serum HE4, etc. (3) Laparoscopy: to check the cell status and to extract peritoneal fluid for cytological examination. (2) Treatment of ovarian tumors Ovarian tumors, whether benign or malignant, should be treated surgically once detected: 1) benign tumors: can be operated under laparoscopy; 2) malignant tumors: generally adopt transabdominal surgery, because malignant tumors are prone to recurrence, attention should be paid to postoperative review and follow-up. Preventive methods of ovarian tumor 1.Oral contraceptive pill: epidemiological survey shows that oral contraceptive pill can prevent ovarian epithelial cancer; 2.Regular physical examination: ovarian cancer has no obvious symptoms in early stage, regular physical examination can improve early detection rate and early treatment has relatively good prognosis; 3.Treatment of lower abdominal mass in time: lower abdominal mass should be diagnosed early, especially cystic mass or cystic mass >6cm. Do not observe blindly and operate early; 4. Preventive ovariectomy: hereditary ovarian cancer syndrome family component is a high-risk group for ovarian cancer, which is related to BRCA gene mutation, and preventive ovariectomy can be performed.