Objective To study the clinical efficacy of compound herba Houttuyniae granules used in mycoplasma pneumonia in the elderly and analyze the change of IL-6,serum myocardial enzymes and vascular endothelial growth factor before and after the treatment.Methods According to treatment methods,80 elderly patients with mycoplasma pneumonia,were divided into the control group and treatment group,40 cases in each group,the control group were given Ribavirin granules,the treatment group was given on the basis of the control group and compound herba Houttuyniae granules.The therapeutic effects and the incidence of adverse drug reactions were observed,and the change of IL-6,serum myocardial enzymes and vascular endothelial growth factor of the two groups before and after the treatment were compared.Results After 7-days'treatment,the efficiency of the treatment group(97.5％) was significantly higher than that of the control group(72.5％) (x2 =9.804,P ＜0.05).After the drug treatment,the rate of adverse drug reactions was 5.0％ in the treatment group,which was significantly lower than the 32.5％ in the control group(x2 =9.928,P ＜ 0.05).Before treatment,the IL-6,serum myocardial enzymes and vascular endothelial growth factor were not significantly different between the two groups (all P ＞ 0.05).After treatment,the IL-6,serum myocardial enzymes and vascular endothelial growth factor of the treatment group were significantly lower than those of the control group (all P ＜ 0.05).Conclusion The treatment of compound herba Houttuyniae granules used in elderly mycoplasma pneumonia is efficient and the incidence of adverse reactions was low.It can improve the clinically relevant outcome measures and is worthy of clinical application.