If there is no adverse reaction to the New Crown vaccine during breastfeeding, breastfeeding can be resumed without a deliberate interval. If there is an adverse reaction to the vaccine, it is recommended to wait until the adverse reaction has fully recovered before resuming breastfeeding. The new coronavirus vaccine is a vaccine developed for the new coronavirus. The guidelines for the new coronavirus vaccination clearly indicate that, based on the understanding of the safety of the new coronavirus vaccine, breastfeeding women can breastfeed normally after receiving the new coronavirus vaccine if there is no adverse reaction to the vaccine and there is no need to wait for a break in breastfeeding to be vaccinated with the new coronavirus vaccine. If the body develops an adverse reaction to the vaccine after receiving the New Crown vaccine, immediate breastfeeding is not recommended, and it is recommended that breastfeeding be suspended while recovering from the adverse reaction to the vaccine. Adverse reactions to vaccines usually recover within 2 to 3 days, and breastfeeding can be done normally after recovery from adverse reactions. If the adverse reaction persists, it is recommended to seek prompt medical attention and treatment.