Attributed to facile fabrication, low production costs and outstanding photoelectric properties, dye-sensitized solar cells (DSCs) have attracted widespread attention in recent years. In order to achieve better photoelectric conversion efficiency of the DSCs, a series of TiO ₂nanocomposite photoanodes co-doped with different amounts of hybrid SiO ₂@Au nanostructures and certain amount of graphene are prepared by a mechanical ball milling method. The influence of SiO ₂@Au nanostructures and graphene on the performance of the photoanodes and their DSCs were investigated. The Au nanoparticles can remarkably enhance the short-circuit current density ( J _sc ) due to the local surface plasmon resonance effect of the noble metal nanoparticles. As a unique two-dimensional material, graphene has several amazing characteristics, such as high specific surface area and excellent conductivity. Studies showed that by introducing both SiO ₂@Au nanostructures and graphene, the light-absorbing, electron mobility and dye loading of the photoanodes were remarkably increased. Experimental results indicated that in comparison with those DSCs based with pure TiO ₂photoanode, the DSCs with photoanodes incorporated with SiO ₂@Au nanostructures and graphene showed the optimal performance with short-circuit current density ( J _sc ) of 15.59 mA/cm ²and photoelectric conversion efficiency (PCE) of 6.68%, increasing significantly by 15.67% and 8.8%, respectively. This significant enhancement in J _sc and PCE of DSCs are mainly attributed to the increase in light-absorption and dye-loading of the photoanodes due to the hybrid SiO ₂@Au nanostructures and graphene.