Objective To observe the effect of Hp infection on the expression of Foxp3 and ROR in peripheral blood of patients with hepatitis C cirrhosis ,and to explore the effect of Hp infection on the regulation of Treg cells. Methods Totally 42 hepatitis C cirrhosis patients with Hp infection were chosen as observation group and 30 patients without as control group. Gene expressions were determined by RE-PCR and relative cell factors were detected by ELISA in two groups. Results Expression of FoxP3 and RORγt in observation group was significantly higher than that in control group;the expression level of IL-10,IL-6,IL-17,TGF-β1 and IFN-γin observation group was significantly higher than that in control group but IL-2 expression level was lower than that in control group and expression of IL-10 and TGF-βwas positively correlated with Foxp3 expression and was negatively correlated with IL-2. Conclusion Through inducing the high expression of Treg cells ,Hp may promote the expres-sion of IL-10,TGF-β1,IL-6 and IL-17,inhibit the expression of IL-2 and IFN-γ,imbalance of Treg/Th17 and Th1/Th2 balance in the body and promote the liver inflammation and fibrosis in patients with hepatitis C liver cirrhosis.