Abstract: Objective To investigate the dietary mineral and vitamin intake of junior high school students, and analyze the relationship between dietary behavior and myopia. Methods The cluster sampling method was adopted to select all junior high school students from a middle school in Beijing suburb from July 2018 to March 2019. The 24-hour dietary review questionnaire and the self-compiled “Dietary Behavior Questionnaire within a week” were used to conduct dietary surveys. The NCCW nutrition software was used to analyze the intake of minerals and vitamins. The nationally used E-standard eye chart was used to check the eyesight of junior high school students. Results A total of 181 junior high school students were investigated, including 92 girls （50.8%） and 89 boys （49.2%）, aged 10-16 years old, with an average of （13.06± 0.96） years old. The consumption of eggs, coarse food grains and soybean products was not good, and only 20 junior high school students （11.0%） could persist in eating coarse food grains 5-6 times in a week. The NCCW software analysis result of the 24-hour dietary review survey found that in the dietary mineral intake of junior high school students, only the intake of phosphorus was more than 90% of the recommended intake in both boys and girls, and the intake of other minerals and vitamins was insufficient, in which the intake of calcium was seriously insufficient, accounting for 23.50% and 26.62% of the recommended intake. Myopia screening found that 56.7% of junior high school students in the school were in the range of severe myopia, and the degree of left eye myopia in girls was higher than that in boys （P <0.05）. Different degrees of myopia vary with the intake of minerals and vitamins. The intake of calcium among students with severe myopia was higher than that of mild and moderate myopia, and the difference was statistically significant （P<0.05）. Conclusion The intake of minerals and vitamins of junior high school students in the school is insufficient, and calcium is related to the degree of myopia. It is suggested that parents and schools should make a scientific and balanced diet to reduce the risk of myopia in adolescents.

Key words: Junior high school students, Myopia, Nutrient intake, Mineral, Vitamin