Objective: To investigate the underlying influential factors related to emotional overeating behavior among college students,and to provide a reference for formulating intervention strategies for prevention of unhealthy eating behavior of college students. Methods: A questionnaire designed based on the social ecosystem theory was used to assess the potential influential factors of at personal, social, physical and macro level emotional overeating behavior of 2 045 college students. The Emotional Overeating Questionnaire was used to measure the frequency of emotional overeating behavior among normal weight college students. Binary Logistic regression analysis was performed to analyze the association between dietary norms and the influence emotional overeating behaviors. Results: In the full adjusted model, dietary norms (OR=1.28,95%CI=1.16-1.41)，emotion scale (OR=1.46, 95%CI=1.24-1.73) and close friends attitude(OR=0.75, 95%CI=0.59-0.95)were associated with emotional overeating behaviors. Sex, urban and rural origin, monthly living expenses, parental attitude, distance to frequent fast food restaurants outside the school, and the unmarked proportion of nutritional content and calorie information on food packaging were not associated with emotional overeating behaviors (P>0.05). Conclusion Dietary norms and emotion scale might increase the risk of motional overeating, close friends attitude might reduce the risk of emotional overeating. For reducing the frequency of unhealthy eating behavior, our results implied that 1) it s necessary to improve mental health of the college students; strengthening health education in order to make them distinguish the unhealthy dietary norms is important; peer education might be effective.