Objective：To observe the clinicaleffect of Shegan Mahuang tang com bined with montelukast for children with cough variant asthm a with syndrome of cold fluid retaining in the lung.Methods：Divided 60 cases of children into two groups randomly，30 cases in each group.The control group was given montelukast，while the observation group was additionally given Shegan Mahuang tang.Observed and analyzed the clinical effect，pulmonary functions[changes of forced expiratory volume in one second(FEV 1 )， forced vital capacity(FVC)， peak expiratory flow rate(PEF)]and the occurrence of adverse reactions in both groups.Results：The total effective rate was 93.33%in the observation group and 73.33%in the control group，difference being significant( P ＜0.05).After treatment，FEV 1 ，FVC and PEF in both groups were significantly improved when comparing with those before treatment( P ＜0.05)；and FEV 1 ，FVC and PEF in the observation group were improved more significantly than those in the control group( P ＜0.05).The total incidence of adverse reactions was 3.33%in the observation group and 20.00%in the control group，difference being significant( P ＜0.05).Conclusion：The application of Shegan Mahuang tang com bined with montelukast treating children with cough variant asthm a with syndrome of cold fluid retaining in the lung can promote the clinical effect and improve the pulmonary functions of patients，which has better therapeutic effect than the treatmentwith simple montelukast.