Objective To analyze the relationship between different types of obesity and metabolic syndrome (MS) and its components among Korean-Chinese and Han-Chinese adolescents in Yanbian area.Methods1) A total of1,207adolescents aged17～18years were finally selected in high school from Antu County of Yanbian and the survey were carried out in2008and2009. All of students knew the informed consent.2) Height, weight, waist circumference and blood pressure was measured by physical examination.3) Triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and blood glucose (FBG) were measured after12hour fasting.4) Body mass index (BMI, kg/m2), waist circumference (WC, cm) and waist-to-height ratio (WHtR) were employed as the obesity indices:overall obesity defined as BMI≥>P90,central obesity defined as WC≥>P90and WHtR≥0.46.5) MS was defined when any three of the five diagnostic criteria were present:①Central obesity defined as WC>P90;②Hypertension defined as SBP and (or) DBP>P90;③Low HDL cholesterol (low HDL-C) defined as HDL-C≤P10;④High triglyceride (high TG) defined as TG>P90;⑤Hyperglycemia defined as FBG≥P90.6) Continuous variables have been examined by t-test; the prevalence rates are given in percent and they have been examined by χ2test; the relationship between different types of obesity and metabolic syndrome (MS) and its components have been examined by Pearson and partial correlation analysis. Different types of obesity as the dependent variable and race, sex, hypertension, low HDL-C, high TG, Hyperglycemia, different type of obesity and MS as independent variables were analyzed by multivariate logistic regression analysis; the variables were selected by BACKWARD, selected variables were significant level as a=0.05and deleted variables were significant level as a=0.1.Results:1)The level of WC、WHtR、SBP、DBP、TG、FBG among Korean adolescents was significantly higher than among Han, and the level of HT and HDL-C in Korean was lower than in Han (P<0.01).2) The prevalence of central obesity(WC≥P90and WHtR≥0.46)(16.7%/9.1%and12.5%/5.9%), hypertension (36.8%/26.7%), high TG (37.5%/10.3%)and MS (8.3%/3.2%) in Korean was significantly higher than in Han (P<0.05).3)The level of WT, BMI, WC, WHtR, SBP, DBP, FBG(Han) in group with general obesity was higher than in normal group in both Korean and Han (P<0.05). The level of WT, BMI, WC, WHtR, SBP, DBP, FBG(Han) in group with central obesity (WC≥P90) was higher than in normal group in both Korean and Han (P<0.05). The level of HT (Han), WT, BMI, WC, WHtR, SBP, DBP, FBG (Han) in group with central obesity (WHtR≥0.46) was higher than in normal group in both Korean and Han (P<0.05).4) The prevalence of central obesity (WC≥P90and WHtR≥0.46), hypertension (Han), hyperglycemia (Han) and MS in group with general obesity was higher than in normal group in both Korean and Han (P<0.01). The prevalence of general obesity, central obesity (WHtR≥0.46), hypertension (Han), hyperglycemia and MS in group with central obesity (WC≥P9o) was higher than in normal group in both Korean and Han (P<0.05). The prevalence of general obesity, central obesity (WC≥P90), hypertension (Han), hyperglycemia (Han) and MS in group with central obesity (WHtR≥0.46) was higher than in normal group in both Korean and Han (P<0.05).5)There was a positive correlation between BMI and WHtR, WT, SBP, DBP, TG, FBG, and a negative correlation with HDL-C (P<0.01); there was a positive correlation between WC and BMI, WHtR, HT, WT, SBP, DBP, TG, FBG (P<0.05); there was a positive correlation between WHtR and BMI, WC, WT, SBP, DBP, TG, FBG, and a negative correlation with HT (P<0.01).6) The prevalence of hypertension, hyperglycemia and MS was obviously increased in the group of general obesity combined with central obesity (WHtR≥0.46), and that was higher than in the group with any one type of obesity (P<0.01). Central obesity seemed to be more effective to the risk of hyperglycemia and MS.7) Our multivariate logistic analysis showed that general obesity is closely related with hyperglycemia, hypertension, central obesity (WC≥P90and WHtR≥0.46) and MS; central obesity (WC≥P90) is closely related withhigh TG, hypertension, hyperglycemia general obesity and MS; central obesity (WHtR≥0.46) is closely related with race, sex, hypertension, hyperglycemia, general obesity and MS.Conclusion:1) The level of WC、WHtR、SBP、DBP、TG、FBG among Korean adolescents was significantly higher than among Han, and the level of HT and HDL-C in Korean was lower than in Han.2) The prevalence of central obesity (WC>P9o and WHtR>0.46), hypertension, high TG and MS in Korean was significantly higher than in Han.3) The level of HT, WT, BMI, WC, WHtR, SBP, DBP and FBG, and the prevalence of hypertension, hyperglycemia and MS in group with obesity was higher than in normal group.4) The prevalence of hypertension, hyperglycemia and MS was obviously increased in the group of general obesity combined with central obesity(WHtR>0.46). Central obesity seemed to be more effective to the risk of hyperglycemia and MS.5) Different types of obesity increased the risk of hypertension, hyperglycemia and MS. Combined use of BMI and WHtR can improve the prediction effect of hypertension, hyperglycemia and MS.