Abstract: Objective:To evaluate the clinical efficacy and safety of Fuxiong powder in the adjuvant treatment of Mycoplasma pneumoniae pneumonia（phlegm-heat closing lung syndrome） in children.Methods:Totally 120 children with Mycoplasma pneumoniae pneumonia（phlegm-heat closing lung syndrome） were selected as the study subjects,who were admitted to the Affiliated Hospital of Liaoning University of Traditional Chinese Medicine，Liaoning Provincial Maternal and Child Health Hospital，Benxi Manchu Autonomous County Hospital of Traditional Chinese Medicine and Kaiyuan Hospital of Traditional Chinese Medicine from October 2024 to January 2025，and they were divided into two groups according to their wishes:60 cases in the experimental group and 60 cases in the control group.The control group was treated with basic treatment with western medicine，and the experimental group was treated with Fuxiong powder in addition to the basic treatment with western medicine.The course of treatment was 7 d.The clinical efficacy，time to remission of main symptoms，disappearance time of pulmonary signs（rales），TCM syndrome scores and adverse reactions were compared between the two groups.Results:After treatment，the healing and improvement rate of experimental group was 72%-22% (39/54),and the total effective rate was 92%-59% (50/54),both of which were higher than the control group ［(50%-91%,28/55）and (83%-64%,46/55)］,showing that the clinical efficacy of the experimental group was better than that of the control group (P<0.05).The relief time of clinical symptoms（cough，wheezing due to retention of phlegm in the throat，shortness of breath） and the disappearance time of pulmonary signs (rales) in the experimental group were both less than those in the control group (P<0.05).The TCM syndrome score was lower than before treatment in both groups，and the experimental group was better than the control group (P<0.05).There was no significant difference in the incidence of adverse events between the two groups（P>0.05）.Conclusion:The adjuvant treatment for Mycoplasma pneumoniae pneumonia（phlegm-heat closing lung syndrome） in children with Fuxiong powder has a good clinical efficacy，which can effectively promote rales absorption and improve the symptoms of cough,wheezing due to retention of phlegm in the throat and shortness of breath，and is safe. 

Key words: Mycoplasma pneumoniae pneumonia, Traditional Chinese medicine external treatment method, Fuxiong powder, Child