Abstract: A method for manufacturing a flexible sensor, including: dispersing graphene in a polymeric material; adding a carbon nanotube into the polymeric material; applying an alternating electric field to the polymeric material added with the carbon nanotube to obtain a composite material; attaching a polymeric material film to the obtained composite material; pre-embedding carbon fibers; and heating and curing to obtain a sensor. A CNT bridging effect and an electric field induced arrangement are introduced at an appropriate ratio of polymeric materials such as graphene-PDMS or PMMA to improve a dry-blended method. The flexible sensor manufactured by the improved dry-blended method improves electrical conductivity, a piezoresistive property and a mechanical property of CNT-graphene-PDMS or PMMA and other polymeric materials.