Uterine evacuation is a procedure used to remove uterine residues in case of incomplete spontaneous, medicated or surgical abortions. The whole process includes preoperative preparation, intraoperative operation and postoperative care: I. Preoperative preparation is based on ultrasound examination to clarify the intrauterine situation, and routine blood, clotting time and routine leucorrhoea examination. Assist the physician to check the indications and contraindications for surgery and sign the informed consent form. 2. Intraoperative operation 1. Position: keep the patient in the truncated position, i.e., maintain the supine position, place the legs on the leg frame, move the buttocks to the side of the bed, and expose the perineum to the maximum; 2. Rinse and disinfection: routinely rinse and disinfect the vulva and vagina; 3. Probe the uterus: fix the upper lip of the cervix with cervical forceps, send the probe to the bottom of the uterus in the direction of the uterine body to understand the size of the uterus; 4. Dilate the cervix: use the cervical dilator to dilate the The cervical canal until it can be passed through the uterine suction. Preoperative oral, intramuscular or vaginal cervical dilating drugs, such as prostaglandin preparations, can also be placed to promote cervical dilation and softening; 5. Clearing the uterus: under no negative pressure, the cervical aspirator is fed into the uterine cavity, and negative pressure is maintained for repeated scraping and suctioning, with emphasis on both uterine corners and the bottom of the uterus, and if tissue is still felt after repeated operations, a scraping spoon can be used to scratch. After the operation, the uterine wall is felt to become rough, or bloody foam appears in the suction bottle. Significant reduction of the uterus upon examination means that the uterus has been emptied and the operation can be ended. If the suction condition is poor, scraping can be performed. Third, postoperative care patients should rest in bed for 1 hour in the observation room, paying attention to abdominal pain and vaginal bleeding. Rest is required for 3 weeks after aspiration and 1-2 weeks is recommended after curettage. Keep the vulva clean and prohibit sexual intercourse and bathing for 1 month to prevent infection. If abdominal pain and increased vaginal bleeding occur, you need to seek medical attention promptly.