Objective To investigate the relationship among sleep quality,obesity and juvenile myopia. Method 1∶1 pair matched case-control study was conducted.177 pairs were matched by age and gender. Results Single factor analysis showed that the median of sleep quality of case group was higher than control group(Z=4.08,P<0.05).There was no statistical relation between juvenile myopia and other varibles such as obesity and overweight (P>0.05),but had correlation with parents myopia(χ²=49.150),the practice of reading in bed(χ²=13.561),reading distance between eyes and book(χ²=16.724),reading for 90minutes(χ²=13.701),taking part in air activities(χ²=13.263),and had dose-effect (P<0.05).Multiple logistic regression analysis showed that sleep quality (OR=1.21),parents myopia (OR=3.83),writing face down (OR=1.58) and reading distance between eyes and book (OR=1.59) were the risk factors of juvenile myopia. Conclusion Sleep quality,parents myopia,writing face down and reading distance between eyes and book are the disk factors of juvenile myopia.