The prevalence of asthma and obesity has increased rapidly in children over the last 20 years and the relationship between the two has raised concerns. Studies have shown that on the one hand obesity and overweight increase the risk of asthma development. The incidence of asthma is higher in overweight or obese children than in normal controls, and the incidence of asthma in children increases with increasing body mass index (BMI). It has also been shown that obesity also aggravates asthma, and obese children with asthmaert have more asthma symptoms, require more emergency care, and take longer to resuscitate than non-obese individuals. Obesity significantly affects the health status of children with asthma, and obese children with asthma recover from acute asthma attacks much more slowly than non-obese children. On the other hand, it has also been reported that asthma causes obesity, probably because children with severe asthma require intravenous or oral glucocorticoids to control the progression of the disease, and even short-term treatment can increase the risk of obesity in children with asthma, and children with asthma experience constant breathing difficulties and are generally less inclined to participate in physical activity to avoid this unpleasant sensation, which can easily lead to weight gain. However, there is little evidence to support this hypothesis, and some studies have shown that obesity occurs prior to asthma. Of course there are many unknown mechanisms in the association between obesity and asthma, and further longitudinal epidemiological investigations and mechanistic studies are necessary. However, for children with obese asthma, standardized treatment of asthma along with aggressive weight control is needed to effectively achieve asthma control.