The prevention of cervical cancer is based on two aspects, one is the prevention of etiology and the other is the preclinical prevention, i.e. “three early” prevention. Although the etiology of cervical cancer is not completely clear, many factors are known to be closely related to it, which can be controlled, such as promoting late marriage, prohibiting early marriage and sexual disorders, practicing family planning, strengthening sex morality and sexual health education, and actively preventing and controlling diseases related to cervical cancer. In addition, environmental protection, appropriate diet and sports should be strengthened to promote physical and mental health and improve immunity. The concept of etiological prevention must be included in health education for adults and adolescents, and such education must be emphasized from the ideological point of view. The responsibility of men in reducing the risk of cervical cancer in sexual partners should be emphasized, as well as the responsibility of women themselves. Education for men should also begin in adolescence. Preclinical prevention is the “three early” prevention. The so-called three early means early detection, early diagnosis and early treatment. The purpose is to prevent the development of the initial disease. The occurrence and development of cervical cancer has a gradual evolution process, which can last from several years to several decades. It is generally believed that this evolution process goes through several stages: hyperplasia, atypical hyperplasia, carcinoma in situ, early infiltration and invasive carcinoma. Therefore, regular screening of married women, timely diagnosis and treatment of precancerous lesions and early stage cancer will effectively prevent the occurrence of cervical cancer and reduce its mortality. Early signs of cervical cancer: (1) Increased leucorrhea, which may have no abnormal smell at the beginning. (2) Abnormal leucorrhea, which can be mixed with blood and accompanied by foul odor. (3) Irregular vaginal bleeding, mostly seen in bleeding during sexual intercourse, bleeding after lower abdominal exertion, bleeding after menopause. (4) Frequent and urgent urination.