Abstract: Objective To analyze the association among general obesity,abdominal obesity,combined obesity and blood pressure among primary and middle school students in Guangzhou in 2014,and to provide a reference for the prevention and control strategies of hypertension.Methods A total of 13 004 students aged 7-18 years seleted from 15 primary schools and 15 middle schools in 11 districts of Guangzhou were recruited in this study.Covariance analysis and Logistic regression model were used to analyze the association between obesity types and blood pressure(systolic blood pressure,SBP and diastolic blood pressure,DBP).Results Covariance analysis showed that SBP and DBP were significantly different among students with distinct obesity types by gender (P<0.01).In boys,the SBP and DBP of general obesity group or combined obesity group were higher than those of normal weight group (P<0.01).In girls,the changing trend of blood pressure in different obesity types was as follows:combined obesity > abdominal obesity > general obesity > normal weight.Logistic regression analysis showed that combined obesity was strongly associated with elevated blood pressure both for boys and girls (boys:OR =4.40,95%CI =3.61-5.36;girls:OR =5.25,95% CI =4.16-6.64).Boys with general obesity also showed a higher risk of elevated blood pressure (OR=2.68,95%CI=1.31-5.49) than boys of normal weight,but the association of abdominal obesity with risk of high blood pressure was not statistically significant.In girls,there were no significant associations among general obesity,abdominal obesity and elevated blood pressure.Conclusion Obesity is an important risk factor for elevated blood pressure in children.Students with combined obesity have the highest risk of elevated blood pressure,followed by those with general obesity or abdominal obesity.