By analyzing the national physique monitoring data obtained in 2010 in Hebei province, It summed up the current situation of overweight and obese people of 3-6 years old in Hebei Province in the age, gender, region and so on, It compared with the national physique monitoring of 3 to 6 years old children of overweight and obesity in 2000 and 2005, analyzed the dynamic change trend of overweight and obese children a few years. The aim is to provide the scientific basis for the prevention and control of obesity among children in Hebei Province, help for the promotion of national fitness program. This paper investigated overweight and obesity children by the research method BMI. The research results indicated that children's obesity rate in Hebei province from regional, age characteristics showed a rising trend; sleep time and activity time from age feature presented two different trends. This paper for children will provide reference and basis for further prevent fat and weight loss.