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We report a novel strategy to prepare densely packed graphene nanomesh-carbon nanotube hybrid film(GNCN)through a simple graphene etching process and subsequent vacuum-assisted filtration method.The ion diffusion ability of the GNCN film is greatly enhanced due to the contribution of cross-plane diffusion from graphene nanomesh and in-plane diffusion from CNT-graphene sandwiched structure.In addition,carbon nanotubes can also efficiently improve the overall electrical and mechanical prop-erties of the hybrid film.Based on its high surface area,fast ion diffusion and high film density,the GNCN film electrode exhibits a specific capacitance of 294 F·g-1 at 5 mV·s-1,higher than the RGO film(185 F·g-1),as well as excellent rate capability.It is worth noting that the GNCN film electrode shows ultra-high volumetric capacitance of 331 F·cm-3.The strategy provides a facile and effective method to achieve high volumetric performance electrode materials for supercapacitor.