Abstract: Objective To explore the influence of the interaction of BMI and WHR on hypertension in Mongolian people.Methods The data of BMI,WHR and hypertension from 2589 Mongolian people were analyzed by log-linear model analysis method.Results Hypertension prevalence rates were 32.1%,47.42% and 64.57% for participants with BMI of less than 24,24～27,and more than 28,respectively.Hypertension prevalence rates were 21.19%,32.90% and 54.02% for participants with WHR less than 0.80,0.80～0.89,and more than 0.90,respectively.Gender,BMI,WHR were independently associated with hypertension(P<0.001).There was no significant association between the interaction of BMI with WHR and hypertension(P>0.05).Conclusion BMI and WHR are independent risk factors of hypertension in Mongolian people,and log-linear model analysis method is an ideal method in analyzing the interaction of poly-dimensional contingency tables.