It is generally recommended that pregnant women with placenta previa should minimize their activities, and may take a walk or do some stretching exercises in the absence of vaginal bleeding. Placenta previa means that the placenta is attached to the lower part of the uterus and its edge is less than 2cm away from the endocervical opening. if pregnant women do exercise with large amount of movement such as brisk walking, it will easily lead to painless vaginal bleeding, which is not conducive to the health of the fetus and the pregnant women. Pregnant women should pay attention to bed rest during pregnancy, can be appropriate to move both lower limbs, appropriate turn over, but also in the absence of vaginal bleeding can be appropriate to walk and do some stretching exercises, can make the pregnant woman to maintain a good mood, but also conducive to the growth and development of the fetus. If the pregnant woman in the process of walking vaginal bleeding, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clear the cause of the disease, symptomatic treatment.