To study the effects of Xiaochaihu Decoction and Xuanfei Jianghuo Decoction in treatment of laryngeal cough and the influence on immune function and airway resistance of patients.Methods:A total of 108 cases of patients with laryngeal cough treated in Dujiangyan People's Hospital from November 2015 to April 2017 were selected and divided into a control group(n=49)and an observation group(n=59)according to different treatment drugs.The control group was treated with routine western medicine,and the observation group was treated with Xiaochaihu Decoction and Xuanfei Jianghuo Decoction.The 2 groups were treated for 14 days continuously.The clinical efficacy and improvement of the main clinical symptoms were compared after treatment.The ratio of T lymphocyte subsets,immunoglobulin and airway resistance in the 2 groups were compared before and after treatment.Results:The total effective rate was 99.61% in the observation group,which was significantly higher than 83.67% in the control group(P<0.05).After treatment,the total clinical symptoms score in the 2 groups were significantly lower than that before treatment and the observation group was significantly lower than the control group(P<0.01).Compared with before treatment,the ratio of CD4+ significantly increased in the 2 groups after treatment,the CD4+/CD8+ and the levels of IgA,IgG,IgM in the observation group significantly increased,and were significantly higher than those of the control group(P<0.05 or P<0.01).The R20,R35,Zrs after treatment in the observation group were significantly lower than before treatment and the control group(P<0.01).Conclusion:Xiaochaihu Decoction and Xuanfei Jianghuo Decoction can obviously reduce the clinical symptoms of patients with laryngeal cough,regulate the immune function,reduce the airway resistance and improve the overall curative efficacy and the effect is remarkable.