Abstract: By means of literature review and logical analysis, the study explored the influence factors of overweight and obesity in children and adolescents, and tried to provide the intervention strategies to prevent the overweight and obesity based on the theory of social networks. The results find that:1) The adolescent overweight and obesity is characteristic of social prevalence and early age worldwide, which has not only intrinsic biological factors but external social factors. 2) Obesity can be infectious or spread inter-personally, so it is key to control the core character of each network groups, which can effectively control the spread of obesity. 3) By means of network interventions such as identification, segmentation, and induction, etc., the leverage mechanism of social networks can be made use of to help accelerate the behavioral change and improve the performance of network groups.