Cervical intraepithelial neoplasia is actually a collective term for pre-cancerous lesions, which are mainly closely related to cervical invasive carcinoma. It includes cervical atypical hyperplasia and cervical carcinoma in situ, which mainly reflects the continuous development process in cervical carcinogenesis and a series of pathological changes from atypical hyperplasia to invasive carcinoma of the cervix. Cervical cancer does not begin with cervical cancer, but is induced by a combination of cervical etiological changes. Among the changes occurring in the cervix, cervical intraepithelial neoplasia is the first symptom of cervical tissue and is also a process of cervical precancerous lesions. When cervical intraepithelial neoplasia occurs, most women actually do not have particularly obvious clinical symptoms, and only a small number of women will have symptoms such as increased leucorrhea, contact bleeding, cervical hypertrophy, cervical congestion, cervical erosion and cervical polyps. If cervical intraepithelial neoplasia is found during cervical cancer screening, then timely treatment is needed to prevent further lesions of the cervix, leading to cervical carcinoma in situ or invasive carcinoma. The treatment can be done in time by Lipo knife surgery, cervical conization surgery, laser and freezing, etc. The prognosis of timely treatment is very good. In fact, it is only a process of lesion and there is no real tumor, timely treatment can cure it completely.