The causes of cervical cancer are mainly related to HPV infection, high number of sexual intercourse and childbirth, and other factors. First, there are more than 120 known HPV viruses, of which more than 30 are related to infection of the reproductive tract, and more than 10 of them are closely related to the development of cervical cancer. High-risk HPV types produce viral oncoproteins, which are hosted in host cells to inactivate or degrade oncogenes and then lead to a series of changes leading to cancer. Secondly, multiple sexual partners, first sexual intercourse less than 16 years old, early childbirth and multiple births are all related to the occurrence of cervical cancer. Imperfect development of the cervix during adolescence is sensitive to carcinogens, multiple births lead to increased cervical trauma, and changes in endocrine and nutrition during childbirth and pregnancy increase the risk of cervical cancer. Thirdly, smoking can increase the effect of HPV infection, and some sexually transmitted diseases can aggravate the chance of HPV infection, leading to the increased chance of cervical cancer; in addition, the long-term existence of cervicitis also increases the chance of cervical cancer; immunosuppression is also related to the development of cervical cancer. In summary, many factors may trigger or aggravate the chance of cervical cancer, so it is necessary to remove these undesirable factors to reduce the chance of cervical cancer.