At present the incidence of bronchial asthma on the rise,its pathogenesis and the genetic immune and the relationship between social environment and other aspects are inseparable the activity of vitamin D(Vit D)in the body in the form of 1,25-(OH)2 d3,mainly involved in bone metabolism and calcium absorption in addition to this,a growing number of studies show that in Vit D plays an important role in the pathogenesis of bronchial asthma,play a role in the immune function of bronchial asthma growth hormone sensitivity adjustment and airway remodeling in this paper,the development of a variety of mechanisms,such as Vit D.Review the possible mechanisms affecting bronchial asthma,hoping to provide adjuvant treatment for patients with bronchial asthma,discover new treatment approaches,and improve the quality of life for patients.