Heart disease in pregnancy is a common and serious obstetric comorbidity and a cause of maternal mortality. The prevalence of heart disease in pregnancy is about 0.5%-3.0%. Combined heart disease in pregnancy can be a combination of congenital heart disease in pregnancy or new heart disease in pregnancy, such as hypertensive disorders of pregnancy and perinatal cardiomyopathy. During pregnancy the uterus enlarges and blood volume increases, which increases the burden on the heart to some extent. Under normal circumstances, the heart can adapt to this change through compensation, but once the maternal heart function is reduced, this additional burden caused by pregnancy can cause further cardiac decompensation, or even cause heart failure, which is life-threatening. Although the red blood cells continue to grow during pregnancy, the growth of plasma in the blood is much higher than the growth of red blood cells, therefore, the concentration of red blood cells and hemoglobin is relatively reduced, the formation of physiological anemia, the heart in order to meet the body’s blood supply, the pregnant woman’s heart rate is higher than that of the non-pregnant person, which increases the burden on the heart. During labor and delivery, the uterus and the whole body muscle contraction, a large amount of blood together back to the heart, back to the heart blood volume increased by 30% to 40%, which makes the whole pregnancy taut heart burden is even more burdensome, easy to make the existing lesions of the heart is more prone to heart failure. Heart disease in pregnancy maternal, how to safely through pregnancy and delivery, all depends on the heart function, so, before pregnancy to strengthen physical exercise, enhance heart function, is to reduce heart disease in pregnancy simple and effective way, not to meet the arrival of the new life to get ready.