If the blood pressure is high during pregnancy, it will seriously affect the blood circulation of the uterine placenta, resulting in slow growth and development of the fetus. If the blood pressure is high for a long time, it will make the fetus intrauterine ischemia and lack of oxygen, and there will be too little amniotic fluid growth restriction, and in serious cases, there may be fetal death in the uterus and other conditions. High blood pressure during pregnancy is mainly a complication of the following two conditions: the first condition is hypertensive disorders of pregnancy, which are symptoms of hypertension, proteinuria and edema after 20 weeks of pregnancy, and is a complication unique to pregnancy. If left untreated, it may endanger the health of the pregnant woman and the life of the fetus. The second condition is chronic hypertension combined with pregnancy. Pregnant women with this condition have slow growth because their blood vessels are in a constricted state for a long time before pregnancy, so that the uterine blood vessels are also in a constricted state throughout pregnancy, resulting in reduced blood flow to the uteroplacenta, which seriously affects the blood supply to the fetus. Whether it is hypertensive disease in pregnancy or chronic hypertension combined with pregnancy, it is necessary to actively carry out antihypertensive treatment so as to improve the adverse pregnancy outcome of the fetus. It is recommended to have a low salt and high protein diet, moderate exercise and reasonable diet during pregnancy, and to seek medical attention promptly if abnormalities occur.