Objective： To discuss the effect of Chinese medicine injection Xiyanping for bronchopneumonia and the lung function in children.Methods：A total of 88 cases of children with bronchopneumonia in our hospital in the same period were selected as the subjects of a comparative investigation and were divided into the observation group and the control group，44 cases in each group.The observation group was treated with Xiyanping，and the control group was treated with ribavirin.The observation indexes included the curative effect，the lung function and so on.Results：The disappearance time of cough，shortness of breath，fever and rales in the observation group was shorter than that in the control group，the difference being significant(P＜ 0.05).The total effective rate was 100% in the observation group，and 88.64% in the control group，the difference being significant(P ＜ 0.05).After treatment，the improvement of the lung function in the observation group was better than that in the control group，the difference being significant(P＜0.05).The total incidence of adverse reactions was 2.27% in the observation group，and 13.64% in the control group，the difference being significant(P＜0.05).Conclusion：Chinese medicine injection Xiyanping for children with bronchopneumonia has strong effect on bacteriostatic and bactericidal activities，relieving cough and improving body immunity，with high safety.But it is necessary to closely observe the possible allergic reaction caused by Xiyanping injection in the course of administration.