Cervical CNI grade 2 is a precancerous lesion of the cervix, and immunohistochemistry is recommended to more accurately determine the extent and nature of the disease in order to guide the next step in the treatment plan. Immunohistochemistry is a tool that can help the pathology department to make further diagnosis, and it can clarify some lesions that cannot be clarified by ordinary tests, such as when the cervix has lesions, the degree of lesions can be clarified by immunohistochemistry. Cervical lesions can be divided into low-grade lesions and high-grade lesions, and high-grade lesions can be divided into CIN2 and CIN3. Because of the different degrees of lesions, the final treatment plan and prognosis are also different, so the general examination may not be able to clarify whether it is a low-grade lesion or a high-grade lesion, which is why it is necessary to carry out immunohistochemistry examination. During the treatment period, we should prohibit sexual intercourse, avoid spicy, cold and other stimulating food, and at the same time strengthen physical exercise to enhance their physical condition.