Objective To study the effects of hemoperfusion treatment on serum interleukin-17 (IL-17) and IL-23 levels in children with Henoch-Schönlein purpura (HSP). Methods Eighty-seven children who were diagnosed with HSP and who had received hemoperfusion treatment between January 2011 and December 2012 were enrolled. Twenty-seven sex- and age-matched healthy children were recruited as normal controls. Enzyme-linked immunosorbent assay (ELISA) was used to measure serum concentrations of IL-17 and IL-23. Results The serum IL-23 and IL-17 levels in the HSP group were significantly higher than in the control group (P< 0.05). After hemoperfusion treatment, the serum IL-23 and IL-17 levels in the HSP group were significantly reduced to the levels of the control group. Serum serum IL-17 level was positively correlated with serum IL-23 level (P< 0.05) in children with HSP. Conclusions Hemoperfusion treatment can reduce serum IL-23 and IL-17 levels in children with HSP, suggesting that the treatment may be effective for HSP.