The following are the basic steps of laparoscopic surgery. 1. Artificial pneumoperitoneum cut the skin at the lower edge of navel wheel 1cm, insert pneumoperitoneum needle at 45 degrees from the incision, and connect the needle tube after blood withdrawal. If normal saline flows in smoothly, it means that the puncture is successful and the needle is in the abdominal cavity. Connect the CO2 inflator, and the intake speed shall not exceed 1L/min, and the total amount shall be 2-3l. The intra-abdominal pressure should not exceed 2.65438 0.3 kPa (65438 0.6 mm Hg). 2. Laparoscopy with trocar needs to be inserted into the abdominal cavity from the cannula, so it is necessary to puncture the cannula first. For the method, please refer to the section "Abdominal Puncture" in this chapter. Laparoscopic intubation is thick, and the incision should be 1.5cm. Lift the abdominal wall under the umbilicus, then slowly insert the trocar into the abdominal cavity obliquely and vertically, and there is a sense of breakthrough when entering the abdominal cavity. Pull out the trocar core, insert it into the laparoscope after hearing the sound of gas rushing out of the abdominal cavity, turn on the light source, adjust the patient's position to the position with head down and hip height 15 degrees, and continue to inflate slowly. 3. Laparoscopic observation The operator holds the laparoscope, and the eyepiece observes the uterus, ligaments, ovaries, fallopian tubes and rectocele. During observation, the assistant can move the uterine lifting device, change the position of the uterus and cooperate with the examination. If necessary, the suspected pathological tissue can be sent for pathological examination. 4. Take out the laparoscope, and then take it out after checking that there is no internal bleeding and organ damage. After exhausting the gas in the abdominal cavity, pull out the cannula, suture the abdominal incision, cover it with sterile gauze and fix it with adhesive tape. 5. Post-treatment of laparoscopy: (1) Antibiotics should be given to prevent infection; (2) Although air has been exhausted before abdominal incision suture, air may still remain in abdominal cavity, resulting in shoulder pain and epigastric discomfort, which is usually not serious and does not need special treatment.