School is an important place for adolescents to carry out physical activity.In order to solve the problem of insufficient evidence of healthy school design,questionnaire survey and statistical analysis were used to empirically study the environmental factors affecting physical activity of adolescents in middle school.The results showed that the influence of environmental quality,functional service and activity support on adolescents'physical activity decreased successively.On this basis,the author puts forward some suggestions on the design of middle school campus environments that promote adolescent physical activity,including helping the activity environment,creating an activity atmosphere,and stimulating activity behaviours,in order to provide reference for the construction of healthy environments in middle school campuses,and to help adolescents grow up healthily.