With the support of leaders at all levels，the Beijing Maternal and Child Health Care Hospital has established an online pregnant women’s school in Beijing in just two months，which has played a huge role in promoting the safety and health of mothers and babies. In the past two years，the number of lectures attended by pregnant women has reached 1.49 million，and the average number of lectures attended by pregnant women is more than 5. According to the relevant survey，the attendance rate of pregnant women has reached 98%，and the knowledge awareness rate has increased year by year. The online maternity school has met the needs of pregnant women for health care knowledge under the epidemic，and played a role in building the safety of mothers and infants and promoting the health of mothers and infants. The research shows that the advantages and necessity of online maternity schools are mainly shown in the authoritative and systematic curriculum content，convenient access to information，and benefit for pregnant and lying in women’s learning. The online curriculum is strongly disseminated，and pregnant and lying in women benefit a wide range of people；System management is an important means to ensure the work of online maternity schools；Pregnant women should pay attention to the course content.