Ni-based　composite　coatings　containing　transition　metal　carbides　exhibit　high　hardness,　and　the　rapid　heating　and　cooling　characteristics　of　laser　cladding　lead　to　the　formation　of　cracks　in　these　coatings,　significantly　limiting　their　practical　industrial　applications.　In　this　study,　(Ti,　V)C/Ni　composite　coatings　were　prepared　at　different　preheating　temperatures　to　investigate　the　effect　of　preheating　on　crack　formation.　The　microstructure　of　the　coatings　was　investigated　by　XRD,　OM,　and　SEM,　and　the　differences　in　wear　resistance　were　studied　by　block-on-ring　wear　tests.　The　results　show　that　with　increasing　preheating　temperature,　the　residual　stress　in　the　coatings　decreases　significantly,　the　secondary　dendrite　arm　spacing　increases,　and　the　number　of　cracks　decreases.　No　crack　defects　were　observed　in　the　coating　preheated　at　700　degrees　C,　indicating　that　substrate　preheating　can　effectively　suppress　crack　formation　during　the　laser　cladding　process.　Compared　with　the　coating　prepared　without　preheating,　the　hardness　and　wear　resistance　of　the　coating　prepared　by　preheating　at　700　degrees　C　were　reduced,　which　was　still　5.6%　higher　than　that　of　the　substrate　after　quenching,　and　the　wear　resistance　was　1.76　times　higher　than　that　of　the　substrate.