Ni-P-SiC complex chemical platings were investigated by chemical co-deposition method. The composition and surface of the plate were analysized by XSP and SEM. The hardness and anti-corrosive abilities were also studied at the same time. The results showed that the plates' hardness increased with the increase of SiC concentration in the plating solutions. SiC concentration of plates were greatly influenced by plating solution concentration and its pH value. SiC concentration of plates got its top value, 16.81%, while SiC concentration in the plating solution was 7.5g/L and plating solution' pH value was 4. 7. However, the plates' surface became dim and rough, and the plates' anti-corrosive abilities decreased.