Abstract: ObjectiveTo know the status and the trends of physical activity among residents in Beijing,and evaluate the effects of Olympic Games on the health of the residents of the host city.Methods1641 permanent residents above 15 years old of 600 families inhibiting in typical communities since the year of 2000 were selected to answer Beijing Typical Community Resident Questionnaire designed by the researcher and the residents'physical activity status was analyzed.ResultsThe physical activity intensity and related knowledge level of Beijing residents elevated year by year(P<0.05),but the attitude, the percentage of participating and regularity were not different(P>0.05).The awareness rate and the percentage of participating of community organized physical activities among Beijing residents increased year by year,but the differences of the attitude were not statistically significant between different years(P>0.05).The Beijing residents'physical activity related knowledge was firstly obtained from the media like TV and newspaper and secondly from introduction of special media programs on Olympic Games.ConclusionBeijing residents'physical activity related knowledge and practice were improved.The key work should focus on the changing of the attitude.