Uterine fibroids are the most common benign tumors of the female genitalia, and it is estimated that one in every 4-5 women over the age of 35 has fibroids. Many patients are asymptomatic and are found during screening. Depending on the location of the fibroids, they are categorized as subplasmacytoid, intermural and submucosal fibroids. Submucosal fibroids include fibroids that are within the uterine cavity or that are detached from the external cervical opening. According to the relationship between the fibroid in the uterine cavity and the uterine wall, submucosal fibroids are divided into submucosal fibroids of type O, type 1 and type 2. type O: with a fibroid under the mucous membrane, without myometrial extension; type 1; without a fibroid, with an extension to the myometrium of less than 50%; type 2: without a fibroid to the myometrium with an extension of more than 50%. Etiology: the cause of uterine fibroids may be related to the high level of estrogen in the body, as well as the genes in the body to determine whether or not to have uterine fibroids. 1.Age: benign tumors mostly occur in women at childbearing stage, malignant tumors mostly occur in old women, and a few special types of tumors occur in adolescent and young women. 2.Fertility: premature delivery, dense birth, multiple births and other reproductive factors, in addition to pregnancy, estrogen level increases, leiomyosarcoma quickly and rapidly become larger. 3.Endocrine:many women take estrogen-containing drugs, supplements and beauty products without doctor’s guidance, which unknowingly increase the estrogen level in the body. 4, bad lifestyle; a lot of smoking, drinking, long-term intake of high-fat food. Symptoms: secondary anemia, menstrual changes, leukorrhea, infertility. Auxiliary examination: ultrasonography probing the uterine cavity X-ray examination Diagnostic scraping. Treatment: Nowadays, hysteroscopic resection of submucosal fibroids and intramural fibroids has been developed as a mature surgery in gynecology. Compared with hysterectomy and transabdominal removal of fibroids, it has many advantages: 1. No open abdomen, which obviously shortens the recovery time after operation. 2. No incision in the uterus, which greatly reduces the chance of cesarean section in the future. 3. The prognosis of the surgery is comparable to that of traditional open surgery. Especially for patients who have never given birth to uterine submucous fibroids, pregnancy can be achieved in 2-3 months after hysteroscopic surgery. Compared with traditional surgery, the time for postoperative contraception is greatly reduced.