▎ 摘　　要

NOVELTY - Mold, comprises a substrate and a convex structure, where the convex structure is protruded out of the substrate and at least one end of the substrate is located in the substrate. USE - The mold is useful for preparing graphene fiber reinforced heat-conducting gasket. ADVANTAGE - The mold: solves the problem of uniform distribution and high orientation arrangement in the composite material e.g. heat conducting gasket. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the graphene fibers, comprising coating a graphene oxide slurry on the mold, drying the graphene oxide slurry and forming graphene oxide film coated on the mold, disassembling the convex structure, stripping the graphene oxide films on the convex structure and the substrate respectively to form a plurality of graphene oxide fibers, carrying out heat treatment on the graphene oxide fibers to obtain graphene fibers, preferably, in the step of peeling off the graphene oxide films on the convex structure and substrate respectively, the peeled graphene oxide films on the substrate form rows of graphene oxide fibers or discrete graphene oxide fibers connected at least at one end and the peeled graphene oxide films on the convex structure form discrete graphene oxide fibers or rows of graphene oxide fibers connected at least at one end, preferably, the graphene oxide slurry, the solid content of graphene oxide is 1-10 wt.%, preferably 2-8 wt.%, preferably, the drying temperature is 40-150℃ or normal temperature, preferably, the temperature of the heat treatment is 2400℃ or higher, more preferably 2800℃ or higher, preferably, the heat treatment time is 2 hours or more, more preferably 4 hours or more. a preparing a graphene fiber reinforced heat-conducting gasket, comprising aligning the graphene fibers, bonding rows of graphene fibers into blocks by using a high molecular polymer, curing and forming to obtain a heat conducting block, cutting the heat-conducting block to obtain the product, preferably, cutting along the direction of 45-135° with the longitudinal direction, and preferably, cutting along the direction of 90° with the longitudinal direction, preferably, the step of cutting the heat conduction block to obtain the graphene fiber reinforced heat conduction gasket further includes cutting off the connected ends of the rows of graphene fibers, preferably, the method further comprises carrying out surface treatment on the graphene fiber reinforced heat conduction gasket, where the surface treatment comprises grinding or/and polishing; and graphene fiber reinforced heat-conducting gasket, comprising graphene fiber and high analysis polymer, where the graphene fiber is longitudinally arranged, preferably, the content of the graphene fiber is 15-70 wt.%, preferably 30-60 wt.%.