Conization is categorized into Sharp Knife Conization Surgery and Cold Knife Conization Surgery, which are generally not easy to be missed. 1. Sharp knife conization surgery: Sharp knife conization surgery is mainly through the way of electric heat, the surface of the cervix ring lesion excision, generally will not have missed the diagnosis of the situation. 2. Cold knife conization surgery: cold knife conization is under anesthesia, the use of cold knife on the cervix for excision, cut down the tissue for a cone, can be clear inside and outside of the cutting edge and the bottom edge of the cutting edge of the lesion or not, can play a better diagnosis and treatment, generally will not occur in the case of missed diagnosis. Cervical conization includes diagnostic cervical conization and therapeutic cervical conization, which is mainly used for the definitive diagnosis of cervical lesions and conservative treatment.