Abstract: A novel filled conductive plastics was prepared by adding nickel-coated carbon fiber/ nickel-graphite powder into PC/ABS. The effects of the conductive filler content and the L/D radio of NiCF on the conductivity of the composites were studied. The results showed when the conductive filler content was increased, the volume resistivity of the composites would decrease, which means the conductivity was improved. Compared with nickel-graphite powder, the effect of NiCF on the conductivity of composites was more significant. The composites have percolation effect, when the NiCF content was between the range of 10% to 15%, the volume resistivity of the composites declined, and the conductivity improved sharply. When the length of the composite particles was about 10mm, the conductivity of the injection molded composites was the best.