In recent years, as the rate of cesarean delivery increases, the complications also increase, and the incidence of diverticulum of the uterine incision after cesarean delivery gradually increases, and gradually attracts attention because it can lead to excessive menstrual bleeding and vaginal bleeding. 1, the etiology: 1, cesarean delivery, the upper edge of the uterine incision is thick and short, the lower edge is thin and long, the suture is easy to docking, plus if the suture needle is too close to cause ischemic necrosis of the incision, or even cracked to form diverticula; 2, the surgical process of endometrial cleanup is not in place, the endometrium ectopic to the incision, long-term endometrial hyperplasia off bleeding, the pressure to the uterine cavity increased rupture to form the uterine incision diverticula; 3, infection: due to premature rupture of the fetal membranes and vaginal dripping bleeding often. The infection is caused by a variety of factors such as premature rupture of fetal membranes, gestational diabetes and other uterine cavity infections, or the patient’s poor postoperative recovery and decreased organism resistance causing infection. A series of factors cause poor healing of the incision caused by diverticula. Clinical manifestations: The patient’s menstrual cycle, period and menstrual volume were normal before cesarean delivery. After cesarean section, the menstrual cycle was normal, mainly manifested by excessive menstrual flow, prolonged menstrual period, vaginal bleeding, the longest period was nearly 20 days, without obvious abdominal pain. Gynecological examination: no obvious positive signs. Diagnosis: (1) Transvaginal ultrasonography is a simple, non-invasive, inexpensive and highly detectable method to detect diverticula at the incision scar, and it is the preferred method of examination. (2) Hysteroscopy. Treatment: 1. Conservative treatment: suitable for patients with menstrual period <14d, little vaginal bleeding, and small diverticula in the uterine incision by ultrasound examination (diverticula depth <6mm). (1) Compound oral contraceptives such as: Daying 35, Eusyn, etc., the symptoms can be improved during taking the drug, some patients take it continuously for 1-2 years, but some patients will still relapse after stopping the drug. (2) Chinese medicine Biochemistry Tang with added flavor for dialectical treatment. Biochemistry soup has the efficacy of activating blood and dispelling silt, eliminating stasis and producing new blood, warming menstruation and stopping bleeding, antibacterial and anti-inflammatory, sedative and analgesic, etc. After applying Chinese medicine, it can promote the discharge of accumulated blood and fluid in the diverticulum and accelerate the repair of trauma, so that the period can return to normal. 2.Surgical treatment: It is suitable for patients with menstrual period >14d, heavy symptoms and large diverticula (diverticula depth >6mm). (1) Hysteroscopic repair and shaping of the incision site, including excision of inflammatory hyperplasia of the endothelium within the incision, cutting the lower edge of the incision to reduce the accumulation of menstrual blood, but often the short-term postoperative results are good and easy to recur. In addition, laparoscopic incision repair and reconstruction, excision of weak areas and re-suturing, also depends on individual healing. (2) Transvaginal hysterectomy is safe and feasible because it is less invasive, patients recover quickly, and fertility is preserved, which is in line with the minimally invasive concept. (3) Hysterectomy is feasible for patients with poor treatment results and no fertility requirements.