The stages of cervical cancer are as follows: 1. Stage I: i.e. microscopic infiltrating carcinoma, stage IA has a better prognosis for surgery; stage IB superficial cervical cancer visible to the naked eye, stage IB1 <4cm, stage IB2 >4cm; 3. Stage II: lesions have exceeded the cervix but have not reached the lower 1/3 of the vagina, or have parametrial infiltration that has not reached the pelvic wall, stage IIB mainly involves the vagina, stage IIB mainly involves the parametrium; 3. Stage III: lesions have exceeded the cervix, vaginal infiltration has reached the lower 1/3, stage IIIB mainly involves the vagina; 3. The vaginal infiltration has reached the lower 1/3, and the parametrial infiltration has reached the pelvic floor, stage IIIA mainly involves the vagina, stage IIIB reaches the pelvic floor and pelvic wall; 4. Stage IV: the lesions have gone beyond the true pelvis, infiltrating the bladder and rectum, and some of them may cause renal dysfunction and hydronephrosis.