Although small, the ovary has complex tissues and is the site with the most types of tumors in all organs of the body. There are many histological types of ovarian tumors, including benign, adventitious malignant and malignant tumors. Ovarian malignancy is one of the three major malignant tumors of the female genitalia. Ovarian malignant tumors are often asymptomatic in early stages and are only discovered incidentally during gynecological examinations or ultrasonography for other reasons. Once symptoms appear, they are often manifested as abdominal distension, abdominal masses and ascites. If the tumor infiltrates into the surrounding tissues or presses the nerves, it may cause abdominal pain, lumbago or lower limb pain; if it presses the pelvic veins, it may cause swelling of lower limbs; if it is a functional tumor, it may cause symptoms of estrogen or androgen excess; if the tumor develops to an advanced stage, it may show cachexia, severe anemia, weakness and other cachectic symptoms. The severity of symptoms depends on the size and location of the tumor, the degree of invasion of adjacent organs, the histological type of the tumor, and the presence of complications. Ovaries are located in the deep pelvic cavity, which are not easy to find or detect. Therefore, it is important to be vigilant and have regular gynecological checkups every year for early detection and early treatment.