Objective To investigate the clinical effect and safety of San' ao Pian's treatment on subacute cough induced by airway inflammation.Methods Ninety cases with subacute cough induced by airway inflammation were selected as our subjects.They were randomly divided into control group(n =45) and San'ao Pian group(n =45).Patients in control group were given regular treatment,and in San'ao Pian group were received San'ao Pian's(1.0 g/time oral,3 times/day) for 2 weeks plus regular treatment.The changes of clinical symptoms such as cough,sputum,and wheeze were observed and recorded at the 3th,7th,14th day.Results (1) The main symptoms regarding of cough were improved in two groups(P ＜ 0.01).The day cough symptoms score in San'ao Pian group were (2.18 ±0.62),(1.22 ±0.46),(0.83 ±0.45) at the 3th,7th,14th days after treatment,lower than that of control group ((2.78 ± 0.55),(2.05 ± 0.41),(1.86 ± 0.68)) and the differences were significant(F within group =10.23,P ＜ 0.05 ; F between =8.46,P ＜ 0.05 ; F intercross group =12.05,P ＜ 0.05).The same trend was seen in night cough symptoms score ((2.12 ± 0.51) vs.(2.38 ±0.38),(1.18±0.44) vs.(1.85±0.49),(1.01 ±0.32) vs.(1.24±0.37) ;Fwithingroup=6.38,P ＜ 0.05 ; F between group =7.59,P ＜ 0.05 ; F intercross group =8.13,P ＜ 0.05).(2) The total efficacy rate of San'ao Pian's was 86.7％,including 22 cases were cured,17 cases markedly effective,higher than that of control group (68.9％),including 14 cases were cured and 17 cases markedly effective,and the difference was significant.Conclusion San'ao Pian's is proved with better clinical effect in terms of treating subacute cough induced by airway inflammation.