▎ 摘　　要

NOVELTY - A conductive fiber composite structure comprises a conductive fiber substrate and a conductive reinforcing layer. The conductive reinforcing layer agent is coated with carbon nanotubes/graphene as conductive agent on an outer surface of the conductive fiber substrate. The conductive fiber substrate is provided to use conductive fiber having carbon black conductive portion on a surface. USE - Conductive fiber composite structure for wearable fabric and fiber-type sensor. ADVANTAGE - The conductive fiber composite structure has excellent electrical conductivity and flexibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of conductive fiber composite structure, which involves (1) adhering the carbon nanotubes and graphene to the surface of the conductive fiber substrate using coating liquid containing carbon nanotubes and graphene to form conductive reinforcing layer having carbon black conductive portion on a surface, and (2) drying the conductive fiber obtained in the step (1).