1, in daily life should be carefully observed to cause the child allergic substances, avoid contact with such as pollen, dust mites, fur, paint, smoke and gas oil and other allergens. 2.Keep the environment clean, the living room should be ventilated frequently, and the light should be suitable and the temperature should be appropriate. 3.Provide reasonable dietary intervention, and be careful with highly allergenic foods such as fish, shrimp, seafood, milk and nuts. 4.The incidence of cough variant asthma is higher in winter and spring, which is related to the increase of allergens (such as pollen, dust and dust mites) and cold weather in the two seasons, which makes it easy to develop, and microbial infections such as bacteria and mycoplasma; therefore, children should pay attention to keeping warm in winter and spring, and increase and decrease clothing in time to avoid catching a cold. 5, strengthen health education: daily life should encourage children to strengthen outdoor sports, such as swimming, ball games, etc., to improve physical fitness.