The difference between stage Ⅰb1 and stage Ⅰb2 of cervical cancer lies in the fact that the cancerous foci are visible to the naked eye in stage Ⅰb1 ≤4cm, and the cancerous foci are visible to the naked eye in stage Ⅰb2 >4cm. Cervical cancer, is the most common malignant tumor in gynecology. Its staging is related to the scope of disease involvement. Stage I means that the tumor is confined to the cervix, stage II means that the tumor goes beyond the uterus but does not reach the pelvic wall or the lower third of the vagina, stage III means that the tumor extends to the pelvis and involves the lower third of the vagina, and stage IV means that the tumor extends beyond the pelvis and infringes on other organs. Among them, stage Ⅰ is divided into stage Ⅰa and stage Ⅰb, stage Ⅰa refers to the invasive cancer confined to the cervix under the microscope, and stage Ⅰb refers to the cancerous foci confined to the cervix visible to the naked eye. Stage Ⅰb can be divided into Ⅰb1 and Ⅰb2, the difference is that the visible cancer foci in stage Ⅰb1 are ≤4cm, and the visible cancer foci in stage Ⅰb2 are >4cm. If you are suffering from cervical cancer, it is recommended to go to regular hospitals to avoid delay.