AIM:To investigate the juvenile ocular hygiene in order to provide a scientific basis for preventive measures of myopia.METHODS:Totally 2568 questionnaires were distributed in a secondary school,2023 valid questionnaires including 1130 male and 893 female were recollected,with an average age of 13.15±0.83 years.Each questionnaire was quantified according to the standard score.Data were analyzed with SPSS 11.5.RESULTS:The average score was 21.16±4.42,score of grade one(21.83±4.31) was higher than that of grade two(20.62±4.44) and the difference was significant.Boy’s(21.27±4.46) slightly higher than girl’s(21.01±4.38),but there was no significant difference.The total qualified was 359 persons,qualified rate was 17.75%.The qualified rate was 22.22% in grade one and 14.09% in grade two,and 17.88% of male and 17.58% of male.CONCLUSION:Irrational diet structure,irregular visual inspection,lack of sleeping time,eyes too close to book when learning,continuous close-learning,improper lighting are main factors of teenagers’ sanitation.