Endometrial cancer is one of the most common malignant tumors of the gynecological reproductive system, mostly associated with excessive or continuous estrogen stimulation. Vaginal bleeding, abnormal vaginal discharge, fluid or pus accumulation in the uterine cavity are the main symptoms of endometrial cancer, among which irregular vaginal bleeding is the most typical symptom, which often starts with a small amount of bleeding and occasionally a large amount of bleeding. Especially postmenopausal middle-aged and elderly women who find a small amount of vaginal bleeding should be alerted to the occurrence of endometrial cancer. Non-menopausal women may manifest as excessive menstruation, prolonged menstruation or midmenstrual bleeding, etc. Sometimes it is manifested as abnormal vaginal discharge, increased discharge, watery or bloody, and some of them are accompanied by lower abdominal pain. Early symptoms of endometrial cancer are obvious and not difficult to detect, and timely consultation should be made when the above symptoms appear. In recent years, hysteroscopy has become one of the diagnostic methods for endometrial cancer. Hysteroscopy can observe the endometrial condition under direct vision and take biopsy of suspicious endometrial tissue directly under the microscope after lesion detection, which improves the accuracy of early diagnosis and can obtain information such as lesion scope and whether the cervical canal is involved to assist in correct clinical staging before surgery. The indications for hysteroscopy are similar to those for full-scale curettage and can be performed under anesthesia if the cervix is narrow or if the patient cannot tolerate it. However, it should be noted that not all patients with endometrial cancer require hysteroscopy, and hysteroscopy should be performed with caution when there are obvious tumors in the uterine cavity.