Abstract: Objective To investigate the dietary behavior of primary and secondary school students during the home segregation of COVID-19 epidemic, so as to understand the influence of epidemic situation on dietary changes of students, and provide a reference for guiding the healthy dietary behavior of students during public health emergencies. Methods On March 3^th to 10^th, 2020, through the wjx.cn, a self-made questionnaire was used to collect general information and dietary habits of primary and secondary school students in various provinces or cities. Refer to Dietary Guidelines for Chinese Residents （2016） to determine the standards for various foods. Results A total of 1 261 questionnaires were recovered in this study, including 1 011 valid questionnaires, with an effective rate of 80.17%. The compliance rate of grain and cereal reaching the standard for primary and secondary school students reached 91.90%, and the compliance rates of vegetables, fruits, meat, aquatic products, eggs and milk were between 59.09%-88.74%, but the compliance rate of soybeans and nuts was only 43.42% and 40.69%. 40.65% of the students increased fruit intake, and 34.22% of the students increased vegetables intake, while 23.05% of the students decreased snack intake. 12.96% of the students increased the average number of meals per day, while 16.91% and 14.24% of the students who decreased the frequency of eating breakfast and night snacks. Conclusion During the home segregation of COVID-19 epidemic, the compliance rate of cereals and other foods for primary and middle school students is relatively high, but less than half of soy and nut intake meet the target. Furthermore, students’ dietary habits have changed significantly, daily intake of fruits, vegetables and grains are increased but snack’s intake is decreased.

Key words: COVID-19, Primary and secondary school students, Diet, Dietary habit