Abstract: Composite films with graphene nanosheets (GNPs) and multi-walled carbon nanotubes (MWCNT) as conductive fillers and polyethylene oxide (PEO) polymer as matrix were prepared. The effects of different filling content and ratios of GNPs/MWCNT on morphology, light transmittance, electrical conductivity and piezoresistive properties of composite film were studied. The results show that with the increase of GNPs/MWCNT filling content, the PEO polymer on composite material surface decreased, and the connectivity of conductive fillers increased. The light transmittance of composite material was reduced to below 50% after filling with GNPs/MWCNT, and the change of filler mass fraction and ratio had little effect on the light transmittance. The electrical conductivity of composite material was significantly improved with the increase of GNPs/MWCNT filling content and ratio. The composite material showed the best pressure-sensitive performance when the GNPs/MWCNT filling mass fraction was 10% and the mass ratio was 1:1, and the test precursor solution had good stability, excellent continuous printing ability, and could be used for large-area printing.