Background: Kawasaki disease (KD) is a medium vessel vasculitis of unknown aetiology that predominantly affecting coronary arteries. The damage-associated molecular pattern molecules (DAMPs) such as HMGB1, S100A12 and IL-17A have been reported to predict poor response to IVIG. Here, we explored the the role of HMGB1, S100A12 and IL-17A in the detection of intravenous immunoglobulin (IVIG)-resistant in KD patients, and to investigate the value of different adjunctive therapy.Method: 126 KD patients and as well as age- and sex-matched 16 febrile control subjects were enrolled in our study. The fresh peripheral blood were collected from KD patients and febrile controls, analyzed the demographic or clinical data and various laboratory parameters. We also measured changes in serum levels of IL-17A and mRNA expression levels of HMGB1 and S100A12 were tested in IVIG-resistant KD patients. Further we explored the association between coronary arteries lesions and different treatment options about IVIG retreatment, methylprednisolone and infliximab for IVIG-resistant KD patients. Result: Regarding laboratory parameters, KD individuals were found to have lower levels of lymphocyte(L)%, prealbumin, CD4+, CD8+ and higher levels of WBC, neutrophil (N)%, CRP, ESR, NT-proBNP, ALT, CD4+/CD8+ (P<0.05 or P<0.01). For KD group, the 53 IVIG-resistant patients had significantly higher levels of S100A12, HMGB1, serum IL-17A, N%, CRP, NT-proBNP, TBIL, ALT, AST and lower levels of L%, PLT (P<0.05 or P<0.01) in comparison to the IVIG-responsive patients. For patients with IVIG-resistant, IVIG retreatment, methylprednisolone or infliximab were used. Methylprednisolone showed better in improving clinical symptoms and CRP than the IVIG retreatment and infliximab (P> 0.05).Conclusion: IVIG-resistant was associated with overreaction of inflammation.The levels of HMGB1,S100A12 and IL-17A suggested to be reliable predictors for IVIG-resistant in KD. In addition, the adjunctive therapy of methylprednisolone and infliximab showed more effective in relieving clinical symptoms than IVIG retreatment.