Abstract: Carbide is the reinforcing phase in metal coating. Its shape, size and content have a significant effect on the properties of cladding layer. These parameters are closely related to the preparation of carbide-reinforced metal-based cladding. The research progress in the preparation technology of carbides reinforced metal matrix composite coating by laser cladding was reviewed. The influence of carbides "ex-situ method", "in-suit systhesis method", "compound introduction method" on the laser cladding coating was analyzed.