Effects of the amoutnt of suspending nano-SiC particulate and cathode current density in the electrolyte on nano-SiC particulate amount and electrolyte rate in Ni-SiC compound electrolyte layer were analyzed at a given pH value, temperature and stirring speed for nano-Ni-SiC composite preparation. The surface morphology and structural constituent in the electrolyte layer were observed by SEM. Effects of nano-SiC particulate amount in compound electrolyte layer on the micro-hardness were approached. The results showed that the nano Ni-SiC plating layer possessed smooth and even surface, uniform and sound microstructure as well as higher micro-hardness than single Ni plating layer.