Abstract: In order to improve the mechanical properties of epoxy, one-step synthesis method was used to obtain graphene oxide(GO)-SiO₂ (GO-SiO₂) hybrid materials.SEM confirmed that three dimensional GO-SiO₂ hybrid materials were prepared successfully.GO, SiO₂ and GO-SiO₂ with the same content of 0.1% mass fraction were added into epoxy to prepare composites.Universal strength tester was used to test the tensile performance of the composites, and the effects of three types of fillers on tensile performance of the resin matrix composites were compared.Then different contents with 0.1%, 0.3% and 0.5% mass fraction of the GO-SiO₂ were added into epoxy to prepare GO-SiO₂ /epoxidation composites, and the effects of different contents of GO-SiO₂ on the tensile perpormance of resin matrix composites were compared.SEM was used to test the fracture cross-section of tensile specimen, and the reinforcing and toughening effect of different kinds and contents of fillers on the resin matrix composites were analyzed, and the reinforcing and toughening mechanism was analyzed.Results show that the reinforcing and toughening effect of GO-SiO₂ is much better than GO and SiO₂ particles, and when the mass fraction of GO-SiO₂ is 0.3%, the reinforcing and toughening effect is the best.