The treatment principle of chocolate cyst is: young women who have fertility requirements are generally treated with drugs and followed up regularly. If the symptoms are serious, the effect of drug treatment is not obvious, or there is a large lump in the ovary, conservative surgery, such as chocolate liquid aspiration of ovarian endometrial cyst, endometrial cyst removal or ovariectomy of the affected side, can be used to preserve normal ovarian and reproductive functions. However, it may still recur after conservative surgery. Patients should adhere to follow-up and try to get pregnant as soon as possible. For women over 40 years old who have no fertility requirements, the whole uterus and one or both ovaries and fallopian tubes can be removed. Treatment for chocolate cysts smaller than 8cm, they can be reduced to disappear completely through drug treatment; For larger ones, surgical treatment should be given priority to prevent them from being twisted or broken due to limb movements. In addition, oral contraceptives can prevent the recurrence of chocolate cyst under laparoscopy. Now we can use the most advanced laparoscopy, which uses a cold light source to provide illumination, inserts a laparoscopic lens (3- 10mm in diameter) into the abdominal cavity, and uses digital camera technology to transmit the images taken by the laparoscopic lens to the post-stage signal processing system through optical fiber, and displays them on a special monitor in real time. Then the doctor analyzes and judges the patient's condition through the images of different angles of the patient's organs displayed on the monitor screen, and performs the operation with special laparoscopic instruments. During the operation, only three small holes of 0.5~ 1cm are needed in the abdomen of the patient. After recovery, there are only 1-3 linear scars of 0.5- 1 cm left in the abdominal cavity, which is only the size of keyhole, so it can be said that the operation has little trauma and pain. The development of Stryker laparoscopic surgery has alleviated the pain of patients, shortened the recovery period of patients and relatively reduced the cost of patients. The most important thing is that the fallopian tube is effectively preserved, and the retention rate is as high as 95.65%, which creates favorable conditions for future fertility and is very suitable for women with fertility requirements. 1, drug therapy: that is, conservative treatment, usually using sex hormones, the principle is to shrink ectopic endometrium by inhibiting estrogen synthesis. If the symptoms are not serious, this method can still be tried. However, if it is an ectopic cyst with large lesions, drug treatment is almost ineffective and can only be treated surgically. 2. Surgical treatment: According to the specific conditions such as illness, effective treatment schemes such as combination of traditional Chinese and western medicine and ovarian cyst removal are adopted. Minimally invasive operation, small incision and quick recovery.