The microstructure of laser clad Ni-Cr-B-Si-C alloy is composed of blocky CrB type chromium carbon borides , Cr7C3 type chromium boron carbides, cellular-dendritic γ-Ni solid solution and various eutectic products. Either an eutectic of γ-Ni+M23C6 or an eutectic of γ-Ni+nickle borides forms depending on the local composition. γ-Ni/Ni3B stable solidification and γ-Ni/Ni2B metastable solidification take place at the same time because of the rapid solidification involved in the laser cladding. Both Cr7C3 and M23C6 contain a high density of twins resulted from stress associated with rapid solidification. In addition, an amorphous phase was found, the γ-Ni surrounded by the amorphous phase exhibited a tweed contrast, suggestiv of a modulated structure.