Objective  To analyze the relationship of height， weight， body mass index and other anthropometric parameters to eye refraction， axial length and other biological parameters of the eye in youths. Methods  It was a cross-sectional study. One hundred and one first-year students （12.9±0.7 years of age） were selected from 2 classes in a middle school in Anyang City of Henan Province. A questionnaire survey was conducted that included near work time， family history of myopia， parental income， etc. Biological eye measurements， autorefraction under cycloplegia， retinoscopy， and axial length to corneal curvature radius （AL/CR） were taken and height， weight， waist circumference， and body mass index （BMI） were measured and calculated. Correlations between the parameters were analyzed using bivariate linear correlation analysis and multiple linear regression analysis. Results  The myopia rate of the selected first-year students in junior middle school was 73.3%， with 63.6% for boys and 80.2% for girls. The mild， moderate and high myopia rates were 35.5%， 33.7% and 4.1%， respectively. After adjustment for age， gender， near work time and family history of myopia， the heavier students had longer axial lengths （r=0.269， P＜0.05） and higher degrees of myopia （r=-0.313， P＜0.05）； the more obese students （greater BMI value） had higher degrees of myopia （r=-0.313， P＜0.05）. No associations were found between height or waist circumference and ocular biological parameters or refraction. Conclusion  There were some correlations between weight， body mass index and axial length， and refraction in junior middle school students.