Objective To assess the association between anthropometrical indices and percent body fat (fat%) with cardio-metabolic parameters in overweight Chinese children. Methods One hundred and seventy-four overweight or obese school children (7~16 years old) were recruited in seven Beijing sub-urban primary and secondary schools in 2013.Anthropometrical indices (height,body weight,waist circumference-WC,and hip circumference-HC) were measured and body mass index (BMI),waist-to-hip ratio(WHR),and waist-to-height ratio(WHtR)were calculated.Assessment of cardio-metabolic parameters [blood pressure; plasma glucose (GLU),total cholesterol (TC),triglyceride (TG),high-density lipoprotein cholesterol (HDL-C),and low-density lipoprotein cholesterol (LDL-C)] were carried out with a 12-hour fasting blood sample.Fat% was measured with a bio-impedance body composition analyzer.Partial correlation coefficient-r was used for express the association of anthropometrical indices and fat% to cardio-metabolic parameters after adjusted for age and gender. Results 1)the average fat% in 7~9,10~12,and 13 years old over were all at least 30%,and fat% increased with age increasing(P＜0.05); 2)WHtR range was in 0.53~0.56.It was higher in boys than in girls(P＜0.05),but there was no significant age difference(P＞0.05).3)anthropometrical indices,fat%,and BMI were moderately associated with systolic blood pressure and HDL-C(r0.30-0.50,P＜0.05);WC and fat% were associated to almost all metabolic syndrome (MS) components(P＜0.05),more than BMI and WHtR. Conclusion Waist circumference and percent body fat(fat%)are superiorly associated with MS components than BMI and WHtR,and they should be among the core indices in obesity research.