Dining behavior mainly includes eating hygiene, eating habits, eating etiquette and so on. In order to understand the dining behavior of large-class children as comprehensively as possible, this paper investigates the dining behavior of 119 large-class children in kindergartens by questionnaire, interview and observation. Through investigation, it is found that there are some problems in children’s dining behavior in large classes, such as a few children’s inattention, most children’s picky eaters and partial eclipse, and children’s dining behavior in the garden and at home is inconsistent. According to the above-mentioned problems, the author puts forward specific measures to improve the dining behavior of children in large classes, such as having a correct concept of family education, making children establish a correct understanding of food, and cooperating with their families to create good dining behavior.