The third dose of the new coronavirus vaccine can be given to boys who are preparing for pregnancy. According to the Technical Guidelines for Neocoronavirus Vaccination, there is no need to delay pregnancy planning just because of the Neocoronavirus vaccination. For those who are planning to undergo assisted reproduction techniques for pregnancy and those who are preparing for pregnancy, it is also possible to receive the new coronavirus vaccine as normal to reduce the risk of new coronavirus infection in the population. If pregnancy is detected, pregnant women should withhold vaccination until after delivery and breastfeeding, and then continue to receive the new coronavirus vaccine. Therefore, men who are preparing for pregnancy can receive the third dose of the new coronavirus vaccine normally, and it does not affect the preparation for pregnancy program. Currently, the new crown vaccine in China is mainly an inactivated virus vaccine. The inactivated vaccine is only antigenic and has no infectious activity. After inoculation, the body will produce immune antibodies to reduce the risk of infection and the severity of post-infection symptoms, and minor adverse reactions such as localized redness and swelling, fever, etc., may occur after vaccination, and serious adverse reactions such as anaphylactic shock are rare. According to the current requirements of our country, people aged 18 years and above are recommended to complete the new crown vaccination, and it is recommended to complete the vaccination in a timely manner according to the requirements of epidemic prevention and control.