Cervical CIN3 is an early stage of carcinoma in situ, and if it progresses to invasive carcinoma, metastasis can occur in a few years to decades. CIN3 means that the cancer cells are still confined to the epithelial layer of the cervix and have not broken through the basement membrane. The lesions are mostly limited in scope and usually do not metastasize directly, but may progress to invasive cancer and invade the epithelial tissues, but may also subside on their own. It may take several years to ten years for in situ carcinoma to progress to invasive carcinoma, and early treatment has a better prognosis. After progression to invasive carcinoma, there is a risk of metastasis in the middle and late stages. For such patients, if they do not have fertility needs, they can choose total hysterectomy to prevent recurrence. Younger patients can preserve both ovaries and do not need radiotherapy after surgery, and the prognosis is generally better. Patients with fertility requirements can opt for conical hysterectomy with intensive postoperative follow-up.