Abstract: In the past 30 years, the rate of child obesity has shown an increasing trend in developed and developing countries, which has severely affected the physical and mental health of children. The causes of child obesity are complex. Despite that inheritance is the important factor that influences the occurrence and development of obesity, the main reason causing the obesity comes from non-genetic factors, mainly including the education of parents, the recognition and attitude of tenders to obesity, the increasing weight of mothers in the pregnancy period and feeding method, dietary behaviors, exercising behaviors, the time spent on viewing the screen, sleeping behaviors and mental factors, etc.

Key words: Obesity, Risk factors, Children