Rubella virus is contagious in pregnant women and can be transmitted to others through the respiratory tract or to the fetus through the placenta. Rubella is an acute respiratory infectious disease, the main mode of transmission is through droplet transmission, of course, after the onset of the patient’s respiratory secretions, blood and feces are all ways of transmission of the virus. Rubella in pregnant women will not only spread to others, but also may spread to the fetus, because the fetus is mainly in the mother’s uterus development and growth, during the period will be infected through the placenta, which will lead to preterm labor, miscarriage or even stillbirth, not only that, the fetus by the impact of the disease will also appear a variety of deformities. Therefore, in general, if rubella virus infection is found in the early stage of pregnancy, it is usually necessary to terminate the pregnancy, but if it is already in the middle stage of pregnancy, it is also necessary to determine the treatment method according to the actual situation of the pregnant woman. Pregnant women infected with rubella is extremely harmful, during pregnancy must do a good job of rubella prevention, usually appropriate exercise and exercise, improve the body’s immunity, strengthen the nutritional supplements, but also pay attention to personal hygiene, timely change of clothing, can effectively reduce the chances of rubella infection.