Objective: To explore the mechanism of traditional Chinese medicine(TCM) combined with regular therapy in the treatment of pneumonia with systemic inflammatory response syndrome(SIRS) in(children).Methods: Sixty-four children with pneumonia including 51 cases with SIRS complication were(randomly) divided into three groups: treatment group(regular therapy+TCM,n=26),control group Ⅰ((regular)(therapy) only,n=25) and the control groups Ⅱ(13 pneumonia children without SIRS(receiving)(routine) treatment). The dynamic changes of tumor necrosis factor-?(TNF-?),interleukin-6(IL-6) and IL-8 were measured before and after treatment in all children.Serum Creactive protein(CRP) and total white blood cell(WBC) count were measured simultaneously.Clinical symptom and sign scores were(performed)(5 days) after treatment in children with pneumonia and SIRS complication.Results: Before(treatment),serum TNF-?,IL-6,IL-8 and CRP concentrations were significantly higher in treatment group and(control) group Ⅰ than(control) group Ⅱ(all P