Abstract: The characteristics of dry sliding friction of high chromium white cast iron with quenching 40Cr steel were studied. A series of high chromium white cast iron with two kinds of carbide and three kinds of matrix structure were tested. The results indicate that (Fe,Cr)₇C₃ is more helpful to rising wear resistance of high chromium white cast iron and lowering friction factor than (Fe,Cr)₂₃C₆. Under high contact stress condition, the alloy with eutectoid matrix gives higher friction factor and has better wear resistance than that with martensite and austenite matrix.