Based　on　the　background　of　the　engineering　application　of　automobile　mold　repair　and　surface　strengthening,　the　effects　of　process　parameters　on　the　formation　and　microstructure　of　laser　cladding　nickel(Ni)-based　alloy　coating　were　studied.　The　optimal　parameters　were:　laser　power　2000　W,　powder　feeding　rate　15　g/min,　scanning　speed　4　mm/s.　Under　this　process,　the　cladding　layer　and　the　substrate　can　exhibit　good　metallurgical　bonding,　and　the　cladding　layer　has　fine　crystal　grains　and　a　low　dilution　ratio.　On　this　basis,　different　mass　fractions　of　niobium　carbide　(NbC)　powder　were　added　to　the　nickel-based　powder　and　laser　cladding　was　carried　out　on　the　surface　of　die　steel.　The　phase　composition,　microstructure,　hardness　and　wear　resistance　of　the　coating　were　studied.　The　results　show　that　with　the　increasing　of　niobium　carbide　addition,　the　hardness　of　the　cladding　layer　decreases,　and　the　wear　loss　of　the　cladding　layer　decreases　first　and　then　increases.　When　the　niobium　carbide　addition　reaches　6　wt.%,　the　wear　loss　of　the　cladding　layer　is　the　least,　and　the　wear　resistance　is　the　best.