Regarding the composite fabrication, our previous work proposed a method combining spray coating with vacuum-assisted resin infusion to achieve CFRP composites with preferred in-plane aligned graphene flakes, which possesses simplicity and flexibility with potential for industrialization, will be continuously used in this work. Also, the effect of the filler loading was investigated , and CFs spray coated with 0.5 wt.% (relative to the CFs) graphene showed the best mechanical performance, and it is selected in this study.