This　article　investigates　the　effect　of　N　content　on　the　microstructure,　mechanical　properties　and　wear　resistance　of　hypereutectic　high　chromium　cast　iron　(HHCCI).　With　the　increase　of　N　content,　the　primary　carbides　are　obviously　refined,　the　austenite　content　increases,　and　the　dispersed　granular　Cr2N　precipitates.　After　quenching　at　1000　degrees　C,　secondary　carbides　are　precipitated　from　the　matrix,　the　matrix　transforms　into　martensite　+　retained　austenite.　With　the　increase　of　N　content,　the　corrosion　resistance　of　HHCCI　increases,　and　0.3　wt.%　N　HHCCI　shows　the　best　corrosion　resistance.　With　the　increase　of　N　content,　the　wear　resistance　of　HHCCI　increases.　The　wear　resistance　of　HHCCI　with　0.15　wt.%　N　is　the　best,　which　is　1.57　times　that　of　HHCCI　without　N.