Ovarian cancer is a common malignant tumor in gynecology. Since there are no obvious symptoms in the early stage of ovarian cancer, usually ascites has formed by the time it is detected, causing symptoms such as abdominal distension and chest tightness. There is a small amount of fluid in the normal abdominal cavity, usually not more than 200 ml. when the abdominal fluid exceeds 1500 ml, it will only be detected by routine abdominal examination. After the occurrence of ovarian cancer, the main reasons for early detection of ascites are as follows: 1. After the occurrence of ovarian tumor, its metastasis mode is mainly termination metastasis, followed by lymphatic metastasis. After the peritoneum is infiltrated by tumor, it stimulates capillaries and increases their permeability, and a large amount of fluid and protein exudes into the abdominal cavity, forming ascites; 2. After ovarian cancer forms a major tumor, it compresses veins or lymphatic vessels, so that blood return or lymphatic return is blocked, forming ascites; 3. After ovarian tumor forms, the peritoneal area on the surface of ovary increases, and the surface of tumor is also easy to form edema, and the fluid between cells is easy to infiltrate into the abdominal cavity The fluid between cells is easy to penetrate into the abdominal cavity and form ascites; 4. Due to the consumption of malignant tumor, the patient is in a state of declining nutrition, protein exudation in the blood and plasma osmotic pressure decreases, which promotes the formation of ascites. Therefore, once women find that they are uncomfortable or have abnormal menstruation, they must be examined and treated in time. If ovarian cancer can be detected at an early stage, it can be well controlled, but once patients have ascites, there is no good way but to go to the hospital for laparoscopic drainage and surgery, and postoperative adjuvant treatment is also indispensable. Finally, ovarian cancer patients must maintain a good state of mind and healthy eating habits, which play a very important role in the recovery of the disease.