Objective To investigate the association of snacks consumption with the nutrition status among children in primary school,and to provide basis for their nutrition education. Method A random cluster sample of the children in primary school received the questionnaire survey and physical examination. Results The prevalence of emaciation among children regularly consuming snacks of the "eligible to regular consumption","moderate to consumption" and "restrained to consumption",was 4.2%,2.5%,1.0%,respectively.The prevalence of over-weight in different snacks category groups were 5.6%,9.9%,18.6%,respectively.The prevalence of obesity in different snacks category groups were 5.6%,2.9%,11.8%,respectively.The differences in the check-up rate of emaciation,normal,over-weight and obesity due to different conditions of snack eating behavior were significant(χ²=20.595,P=0.002). Conclusion It is suggested that effective nutrition education activities should be implemented to make the students know more nutritional knowledge and take healthy dietary practices.