Longitudinal uterus: It is the most common congenital uterine malformation in the reproductive system. As longitudinal uterus occupies and divides the volume of the uterine cavity, the intrauterine space becomes smaller, which easily leads to embryonic abortion or intrauterine growth retardation, resulting in ectopic pregnancy or prolonged infertility and preterm delivery and fetal malposition. Therefore, those with a history of infertility, recurrent miscarriages, unexplained premature births, abnormal fetal position, and uterine cavity operations that reveal longitudinal septum should be treated early to improve pregnancy outcomes. Pre-operative preparation: Pre-operative can be done by any of the following methods: iodine oil imaging of the uterine tubes (HSG), 3D ultrasound or transvaginal ultrasound suggesting a longitudinal uterus, ultrasound combined with hysteroscopy to measure the outline of the uterus and the shape of the uterine base, identify the uterine morphology and type of malformation, exclude bicornuate uterus and bowed uterus to clearly diagnose a longitudinal uterus, and admit to the hospital. Routine gynecological preoperative examinations and laboratory tests were performed to exclude reproductive tract infections and important organ diseases. The operation was performed within 3-7 days after menstruation, and hysteroscopic surgical incision was the most mature treatment. Surgical method: For longitudinal uterus with a history of pregnancy within the last year and a clear uterine shape on ultrasonography, hysteroscopic electrosurgery under the supervision of ultrasound is used for those without indications for laparoscopic exploration. For primary infertility, secondary infertility or combined pelvic lesions with indications for laparoscopic investigation, combined hysteroscopic laparoscopic surgery under laparoscopic supervision is used. Surgery for complete longitudinal uterus requires slightly higher technique. Postoperative uterine cavity placement of the uterine ring: j hormone therapy from the second day after surgery: you can use supplemental Jiale 3mg orally for 21-30 days, and add progesterone for the last 10 days, and take the cycle for 2-3 months; or phenometholone orally for 2-3 cycles. Estrogen and progesterone are obviously beneficial to the endometrial repair of the uterine fundus after surgery. Those who use hormone therapy have thick endometrium and good endometrial repair of the mediastinum resection wound. It is a clear indication especially for patients with wide and thick mediastinum and severe endometrial damage. Follow-up treatment with hormones is not recommended in case of combined fibroids or endometriosis. IUD removal 2-3 months after surgery: If the review hysteroscopy is normal, the patient can be advised to prepare for conception, and more than 90% can conceive spontaneously with good outcome. If natural conception fails, artificially assisted conception techniques should be recommended. These measures are key factors in reducing the duration of postoperative contraception and improving the postoperative pregnancy rate.