Abstract: Objective To evaluate the effectiveness of the interventions on the exposure to passive smoking for the non -smoking pregnant women, and to propose advice on improving the environment for pregnant living. Methods Questionnaires had been employed to survey 1 100 non-smoking pregnant women who met the inclusion criteria in maternity and child hospital, maternity hospital of Kaifeng. Multinomial Logistic was used to evaluate the effectiveness of the interventions on the exposure to passive smoking for the non-smoking pregnant women. Results Non-smoking pregnant women had lower exposure level after intervention (OR=1.564,P<0.001), the exposure level in third survey was lower than that in baseline survey, but higher than that in second survey. Secondly, amount of husband and other families tobacco use was significantly positively related to exposure level of non-smoking pregnant women. The more tobacco consumption of family, the higher risk of exposure level of non-smoking pregnant women. The non-smoking pregnant women who were young and live in the core family structure (the couple or couple with children), had higher exposure level. The non-smoking pregnant women who had better education, more knowledge of passive smoking and stronger attitude against the passive smoking, had lower exposure level. Conclusions We should strengthen the health education, consciousness of people to tobacco control and follow up the special population of non-smoking pregnant women,thus,to improve the status of passive smoking for pregnant women.