【Objectives】 To study influencing factors of childhood overweight and obesity based on 5-2-1-0 model and to provide the basis for preventing childhood obesity. 【Methods】 Using stratified random cluster sampling method,a total of 1 584 school-age children were selected from three primary schools in Shandong Province.A self-designed questionnaire was used to survey children's height,weight,daily activities,eating habits and so on.The relationship between 5-2-1-0 model and childhood obesity was analyzed with χ² test and binary logistic regression. 【Results】 The research showed that the rates of the overweight and obesity were 13.8% and 13.3%,respectively.Daily TV watching and computer playing time,daily outdoor exercise time and weekly sugary drinks drinking frequency in 5-2-1-0 model were associated with childhood overweight and obesity. 【Conclusions】 The rates of urban childhood overweight and obesity in China are close to that in developed countries;Meaningful factors can be learned from 5-2-1-0 model and put forward a suitable health promotion model to prevent childhood overweight and obesity in China.