CIN grade 3, also known as cervical high-grade squamous intraepithelial neoplasia, is one of the precancerous lesions of the cervix, which mostly needs to be treated by surgical methods, including LEEP and cervical conization. Squamous intraepithelial lesions of the cervix, divided into low-grade intraepithelial lesions and high-grade intraepithelial lesions, should be treated in an individualized and standardized manner, to prevent under-treatment and over-treatment, and also take into account the grade, location, scope, and regression of the squamous intraepithelial lesions, as well as the type of transformed area seen in colposcopy, the status of HPV infection, and the patient’s age and reproductive requirements. There are two types of treatments: destructive and excisional. destructive treatments, such as freezing, laser, and microwave treatment of the cervix, are mostly used for CIN1, which is suitable for cervical tissues with satisfactory colposcopy, biopsy to exclude cervical cancer, and cervical tube scraping with no abnormalities in patients without glandular cell involvement. excisional treatments, such as cervical cerclage, cold knife conization, and cervical migration, are mostly used for CIN2 and CIN3. area of the cervix with extensive circumferential electrosurgery.