AIM: To study the myopia and influencing factors among primary school students in Haidian, Beijing.

METHODS: A total of 801 primary school pupils from grade one to grade three of Beijing were selected according to the cluster stratified sampling method, and 801 questionnaires were collected from the scene, which accorded with 757 people aged 7-10 years old, and 757 valid questionnaires, the prevalence rate of this study was 24.4%. The baseline data of all the subjects were collected through questionnaires. The data of myopia were compared. The Logistic regression equation was used to calculate the factors causing myopia.

RESULTS: The main factors leading to myopia in primary school were reading time, electronic product use time, parents' myopia, outdoor activity time, and reading and writing postures. The above difference data was brought into the Logistic regression equation to confirm.

CONCLUSION: The myopia rate of primary school students in Beijing has reached a high level. There are many problems in family, daily life and students themselves. It is necessary to prevent and control the occurrence of myopia and promote the vision health of primary school students.