Objective To explore the relationship between activity level during pregnancy and fear of falling and to provide reference for increasing the amount of activity during pregnancy. Methods A total of 439 pregnant women who received routine prenatal examination in obstetric clinic, were surveyed with the general information questionnaire, the Falls Efficacy Scale International （FES-I） and the Pregnancy Physical Activity Questionnaire （PPAQ）. Results The amount of activity during pregnancy was 72.16（39.62，103.28） MET/(hour·week), and the mean score of FES-I was （39.50±12.52） points. There was a negative correlation between the amount of activity during pregnancy and fear of falling （r=-0.528,P<0.01）. Multiple regression results showed that family monthly income,work during pregnancy,the way of conception and fear of falling could explain 60.3% of total variation in the amount of activity during pregnancy. Conclusion The amount of activity during pregnancy is low, and fear of falling is common in pregnant women. Higher level of fear of falling may lead to decrease of activity during pregnancy. Medical workers should take effective measures to intervene fear of falling and build up pregnant women′s confidence in activity, in an endeavor to increase the amount of activity during pregnancy and promote the health of mothers and infants.