This　paper　studies　the　structure　of　IBED　Cr-N　coatings　with　different　parameters　such　as　N　partial　pressure,　N　ions　bombarding　energy　and　N　ions/Cr　atoms　ratio.　The　results　show　that　the　chemical　composition　and　structure　of　the　coatings　are　mainly　determined　by　N　partial　pressure.　According　to　N　partial　pressure　increasing,　there　are　an　increase　of　CrN　phase　and　a　decrease　of　Cr　and　Cr2N　phase.　The　grain　orientations　of　the　coatings　are　affected　by　bombarding　energy.　When　N　ions/Cr　atoms　ratio　changed　from　1.45×10-2　to　5.87×10-2,　high　N　ion　flux　of　bombarding　will　result　in　acceleration　of　sputtering　away　from　the　coated　CrN　layer　as　well　as　its　decomposition.　In　the　mean　time　Cr2O3　is　easy　to　be　produced　in　the　layer.