Four-week-old baby weight obesity, may be related to improper diet, less exercise, first of all, pay attention to a reasonable diet, while parents can and children for appropriate exercise. 1. Reasonable diet: diet is very important, the weight of fat considerations can make the calories too high have a certain relationship, but 4-year-old children also need to pay attention to enhance the nutritional recommendations, first of all, pay attention to slow down the speed of eating, do not eat high calorie food, cake food, and so on. 2. appropriate exercise: 4-year-old children’s parents can also do with their physical fitness suitable aerobic exercise, such as jumping rope, fast walking, jogging, etc., have a certain role in controlling body weight, the minimum duration of 30 minutes or more, easy to achieve better results. 4-year-old children to reduce weight, in fact, parents are still the main attention to the dietary structure of the regulation, but also need to reduce weight under the supervision of parents, if necessary, consult the regular hospital children’s health department.