The cervical cancer vaccine is best administered before the first sexual intercourse. If you are already having sex, you can get it before you get pregnant; if you are already pregnant, it is recommended that you get it after giving birth; if you have already received one dose, the second dose is recommended to be postponed until after giving birth. There are different types of cervical cancer vaccine, bivalent cervical cancer vaccine is given at the age of 9-45 years, quadrivalent cervical cancer vaccine is given at the age of 20-45 years, and nine-valent cervical cancer vaccine is given at the age of 16-26 years. After the vaccination, women can effectively prevent high-risk human papilloma virus infection and prevent cervical, vaginal and vulvar cancers. There are many precautions to take when receiving the cervical cancer vaccine, including avoiding menstruation and breastfeeding, and not receiving the vaccine during pregnancy. After the cervical cancer vaccination, it is recommended that pregnancy be considered only after six months. If a woman becomes pregnant during the cervical cancer vaccination, the effect is generally less and the indicators of the maternity examination are normal, so she can continue her pregnancy and have regular maternity examinations, but she needs to postpone or interrupt the vaccination and have the vaccination again after the pregnancy period. Before receiving the cervical cancer vaccine, women with a history of sexual intercourse need to undergo cervical cancer screening to clarify whether there are lesions on the cervical epithelium and high-risk HPV infection before deciding whether they can receive the cervical cancer vaccine. Cervical cancer vaccination cannot prevent all cervical cancers, so annual cervical cancer screening is still needed.