A TiC-ZrC particulate reinforced Ni-based composite coating has been synthesized in-situ by laser cladding with pre-pasting on steel 45# . The microstructural and metallographic analyses were performed by scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS) and X-ray diffractometer(XRD). The microhardness and wear resistance of the coatings were tested. The results indicate that the composite coating is bonded metallurgically to the substrate. The microstructure at the bottom of coating consists mainly of oriented dendrites of γ(NiFe). The microstructure locating at the middle and upper zones contains both TiC-ZrC particle and acicular Cr3C2 phase dispersed in the matrix of γ(NiFe) solid solution. The TiC-ZrC particulate reinforced composite coating has a high average hardness of HV0.31300 and better wear resistance. The wear mass loss of the composite is just one fourth that of the pure Ni60 coating. The improvement in wear resistance is due to the presence of numerous of in-situ synthesized TiC-ZrC particles and their well distribution in the composite coatings.