Objective To observe the clinical efficacy of Fengke Nongjian Decoction in the treatment of postin-fectious cough(PIC)after respiratory tract infection and its impact on airway inflammation.Methods A total of 122 patients with respiratory PIC,treated at the Nanjing Integrated Traditional Chinese and Western Medicine Hospital Affiliated to Nan-jing University of Chinese Medicine from January 2021 to June 2023,were selected and randomly divided into two groups:an observation group and a control group according to a random number table,with 61 patients in each group.The control group received conventional Western medication,while the observation group was treated with Fengke Nongjian Decoction in addi-tion to the conventional treatment.After 10 days of treatment,clinical efficacy,symptom relief,adverse reactions,traditional Chinese medicine(TCM)syndrome scores,Visual Analogue Scale(VAS)scores,Cough Evaluation Test(CET)scores,Leices-ter Cough Questionnaire(LCQ)scores,and inflammatory markers[serum interleukin-6(IL-6),interleukin-8(IL-8),tumor necrosis factor-α(TNF-α),substance P(SP)]before and after treatment were compared between the two groups.Results After treatment,the observation group showed significantly faster disappearance of symptoms such as cough,ex-pectoration,throat itching,and wheezing than the control group(P<0.05).Both groups had significant reductions in symp-toms such as cough,throat dryness and itching,expectoration,and shortness of breath,as well as total scores,after treatment(P<0.05).The observation group showed lower scores of cough,throat dryness and itching,expectoration,and shortness of breath,as well as total score,than the control group(P<0.05).Both groups also exhibited a significant reduction in cough VAS and CET scores after treatment(P<0.05),with the observation group showing greater reductions than the con-trol group(P<0.05).LCQ scores increased significantly in both groups after treatment(P<0.05),with the observation group showing a more substantial increase than the control group(P<0.05).Inflammatory markers(SP,IL-6,IL-8,and TNF-α)were significantly reduced in both groups after treatment(P<0.05),with the observation group showing more pronounced reductions than the control group(P<0.05).The total effective rate in the observation group was 98.28%(57/58)with a recovery rate of 86.21%(50/58),significantly higher than the control group's total effective rate of 86.67%(52/60)and recovery rate of 63.33%(38/60)(x2=4.114,8.138,P<0.05).There was no significant differ-ence in the incidence of adverse reactions between the two groups(x2=3.282,P=0.070).Conclusion Fengke Non-gjian Decoction is effective in improving clinical symptoms,shortening the course of illness,and enhancing clinical efficacy in the treatment of PIC.Its mechanism may be related to the reduction of airway inflammation.