Objective To understand the status of knowledge,attitude and practice (KAP) about binocular visual function among school-age children,and to provide a reference for scientific care in health education.Methods An investigation was conducted to survey school-age children in four elementary schools in a district of the city of Shanghai,randomly selecting one class from every grade and using a specially designed questionnaire to learn about binocular visual function KAP.Data were analyzed using a chi-square test,an independent samples t test,and an ANOVA.Results Six hundred twenty-four questionnaires were sent out and 503 questionnaires were retrieved and valid.The ratio of valid questionnaires was 80.6％.There were no significant differences in binocular visual function K,A,P scores when comparing the four grades and comparing the boys and girls.For every grade,K,A and P scores were not equal (F=47.828,48.568,48.004,50.330,P＜0.05).LSD-t tests showed that K scores differed significantly from A scores (P＜0.05) but not from P scores (P＞0.05),A scores differed significantly from P scores (P＜0.05),and A scores of the school-age children were higher than K and P scores.Conclusion Knowledge of binocular visual function and practice of school-age children are relatively poor,but their attitude is fairly good.Health education should be designed so the binocular visual function KAP curriculum is appropriate for school-age children.