Asthma is commonly termed "roaring disease",referring to gurgling with sputum in the throat,characterized by difficult and rapid breathing.Infantile asthma belongs to a kind of bronchitis,and would occur repeatedly and become a chronic disease.Because the defending function of the respiratory system in children has not been complete and the immune system of the respiratory tract has not been matured,the hyperactive inflammatory reaction would happen,if stimulated by inducing factors of some allergen,infection or emotional depression,so as to develop dyspnea,increased secretion of phlegm,and spasm of bronchial smooth muscle,hindering the normal ventilation of air and resulting in asthma,manifested by the clinical symptoms of dyspnea,shortness of breath,unsmooth expectoration,and wheezing.In