目的 比较6～8岁骨龄段女性儿童不同的体脂率测量方法的效果，尝试建立适合我国该骨龄段女性儿童的皮褶厚度推算体脂率公式。 方法 抽样选取59名6～8岁骨龄段女性儿童，依据身体质量指数(BMI)分组标准分为偏瘦组、正常组和超重组3个组别，分别采用双能量X线吸收法(DEXA)、皮褶厚度法、生物电阻抗法（BIA）测试每位受试者的体脂率，以DEXA测量结果为校标，比较上述方法在推测和测量全身体脂率的差异水平。并以皮褶厚度法建立体脂率推测公式。 结果 对6～8岁骨龄段女性儿童正常组和超重组，BIA法与DEXA测量结果之间相关显著；日本长岭公式显著高估6～8岁骨龄段偏瘦组和正常组女性儿童的体脂率，姚兴家公式显著低估了超重组女性儿童的体脂率，而元田恒公式显著高估了3种体型女性儿童的体脂率；本研究得出皮褶厚度法推算体脂率公式为：全身体脂率=3.919＋0.715×髂嵴上部皮褶＋0.592×肱三头肌部皮褶。 结论 相对于以日本长岭公式、元田恒公式、姚兴家公式进行的皮褶厚度推算法，生物电阻抗手段更能有效测量6～8岁骨龄段女性儿童正常和超重群体体脂率；髂嵴上部和肱三头肌部皮褶厚度能联合评价6～8岁骨龄段女性儿童全身体脂率。

Objective To compare the different measurement methods of the body fat rate for 6-8 years’ bone aged girls，and establish a formula based on the skinfold measurement. Methods Fifty-nine 6-8 years bone aged girls in primary schools were recruited and divided into three groups which were the underweight，normal and overweight groups. Fat rates were tested respectively by dual-energy X-ray absorptiometry(DEXA), bioelectrical impedance method(BIA), and skinfold method. All the data were statitically analysised with SPSS 13.0. Results There was a significant correlation between the BIA and the DEXA measurements in normal and especially in obese girls. Changling formula significantly overestimated the body fat rate in underweight and normal group. Yao Xing-jia formula significantly underestimated the body fat rate in overweight group.Yuan Tian-heng formula significantly overestimated the body fat rate in all three groups. We established a body fat rate formula based on skinfold measurement： body fat percentage=3.919 +0.715 skinfold in waist circumference＋0.592 skinfold in triceps. Conclusion For normal and overweight bone-aged 6-8 years’girls, BIA is an effctive way to measure their body fat rate. Changling,Yuan Tian-heng, and Yao Jia-xings’ fomulas showed some deficency in overestamating or underestimateing their body fat rate. Skinfold of waist circumference together with skinfold of triceps may effectively evaluate their body fat rate.