As　a　surface　repair　and　strengthening　technology,　(Ti,　Nb)C/Ni　coatings　with　different　amount　of　CeO2　were　fabricated　to　repair　the　automobile　dies.　The　phase　constitution,　microstructure,　texture　characteristics　of　oriented　growth,　micro-hardness,　tensile　properties　and　the　action　mechanism　of　CeO2　were　investigated.　The　results　showed　that　the　diffraction　peaks　of　gamma-Ni(Fe),　(Ti,　Nb)C,　Cr7C3　and　Cr23C6　drifted　slightly　as　a　result　of　solute　atoms　incorporation.　The　compact　and　homogenized　microstructure　of　coatings　was　dominated　by　small　striped　precipitated　phases　and　particles　according　to　SEM　and　TEM　results.　The　size　of　(Ti,　Nb)C　particles　were　suppressed　by　rare　earth　element　Ce,　which　was　prone　to　accumulate　at　the　interface　of　grain　boundary　or　crystalline　phases.　The　unmelted　CeO2　can　also　become　the　heterogeneous　nucleation　basement　of　(Ti,　Nb)C,　Cr23C6　and　Cr7C3　particles.　EBSD　results　showed　that　the　grain　growth　orientation　of　coatings　was　changed　by　the　effect　of　CeO2　on　the　fluidity　of　molten　pool,　as　well　as　the　growth　of　particles.　In　addition,　the　tensile　properties　of　coatings　were　improved,　and　the　fracture　behavior　was　transformed　from　the　quasi-cleavage　fracture　to　brittle　fracture　with　the　increase　of　CeO2　addition.