The thermal insulating properties of polymer greatly restrict the application of polymer as the thermal conductivity materials in industry. Multilayer graphene was chosen as a filler due to its unique thermal transfer property. The effect of alumina oxide (Al₂O₃) and silicon carbide (SiC) with graphene as hybrid fillers on thermal conductivity of polymers was also explored. The thermal conductivity of the composites enhances 161% with 3%(mass fraction) graphene content compared to pure nylon-6(PA6). The thermal conductivity of PA6 composites is within 0.653-4.307W·m^-1·K^-1 by adjusting hybrid fillers content and the ratio of graphene with Al₂O₃ and SiC. The best thermal conductivity is 20 times higher than the pure PA6. It is no doubt that the exploration can provide valuable experimental basis for extending the utilization of graphene as thermal conductivity filler and the application of PA6 thermal conductivity materials in industry.