The following points should be prepared before the hysteroscopic surgery: 1. The time of surgery should be clearly defined, the most suitable time is within 3-7 days after menstruation, when the endometrium is in the early stage of value-added, thin, less prone to bleeding and less mucus, and lesions in the uterine cavity are easier to detect. 2. The procedure should take about half an hour, most often less than 2 hours. 5. post-operative recovery, post-operative antibiotic infusion for about 3 days, waiting for the pathology results to return no abnormalities can be discharged, after discharge from the hospital contraception for 1 month, prohibit tub bathing for 1 month, the next menstruation after the clean clinic review.