Group B streptococcal infection in pregnant women usually does not require treatment during pregnancy if there are no symptoms. Patients are advised to start treatment more than 4 hours before delivery and can follow medical advice with drugs such as penicillin. Group B streptococci are pathogenic bacteria that live in the vagina and rectum and usually do not cause disease, but for individual pregnant women with low resistance and poor immunity, group B streptococci may multiply and cause infection. If the patient is asymptomatic, treatment is usually not necessary during pregnancy. However, during delivery, group B streptococcus in the lower genital tract of the mother increases the risk of infection in the newborn, especially after premature rupture of membranes when the fetus inhales group B streptococcus-infected amniotic fluid or passes through the birth canal, which can easily lead to lung infection. Therefore, the best time to treat pregnant women with group B streptococcal infection is more than 4 hours before delivery to prevent fetal infection. In daily life, pregnant women should pay particular attention to personal hygiene, wash their vulva with warm boiled water every day, keep their vulva clean and dry, and change their underwear so as not to cause local heat and humidity and breed bacteria. In addition, the basin and towel used for washing should be disinfected by exposure to the sun, and should be used exclusively for this purpose.