Abstract: Objective To investigate the influence of life bebavior on hypertension prevalence among community obesity people.Methods With multi-stage sampling,we sampled 21 951 community residents aged 18-80 years living in Tianjin randomly for a survey on their life behavior and health conditions.Results The average age of the residents was 47.5±15.8 years,with 48.7% of male and 51.3% of female.The proportions of smoker and alcohol drinker were 29.4% (6 446) and 28.3%(6 203).The prevalence of hypertension was 22.0% (4 797) and the prevalences of overweight and obesity were 34.8% (7 642) and 10.0% (2 192).The risk of hypertension increased with the increment of body mass index (BMI) and life behaviors such as smoking,high salt intake(> 6 g/d) promoted the risk among the residents.Under the condition of overw eight or obesity,the people of smoking,alcohol drinking,with salt intake of more then 6 g/d,and without active exercise were more likely to have hypertension.Conclusion Although obesity people have a higher risk of suffering from hypertension,they could low er the risk by taking healthy life behaviors such as quiting smoking,decreasing alcohol consumption,taking less salt,and more active exercises.