More than 90% of cervical cancers are caused by HPV infection, which causes cervical lesions, starting with CIN1 (mild cervical intraepithelial neoplasia) and gradually progressing to moderate lesion CIN2 → severe lesion CIN3 → carcinoma in situ → invasive carcinoma, a process that usually takes 3-10 years, and the pre-invasive lesions can be diagnosed through cervical cytology smear examination, and then corresponding treatment measures can be taken to interrupt this process. We can diagnose the pre-invasive lesions by cervical cytology smear and then take appropriate treatment measures to interrupt this process, thus preventing the occurrence of cervical invasive cancer. As a woman of childbearing age, it is recommended to have a gynecological examination at least once a year and a cervical cytology smear screening (TCT) at least once every 2-3 years to basically prevent cervical cancer. Of course, pay attention to sexual hygiene, usually the more disordered the sexual life of women or their spouses and the more sexual partners they have, the higher the chance of cervical lesions and cancer.