▎ 摘　　要

NOVELTY - A graphene nanobelt graft-modified polybenzoxazole polymer having repeating unit (I), is new. USE - Graphene nanobelt graft-modified polybenzoxazole polymer for forming polybenzoxazole fiber used for heat-resistant textiles. ADVANTAGE - The graft-modified polybenzoxazole polymer provides fiber having excellent tensile strength. DETAILED DESCRIPTION - A graphene nanobelt graft-modified polybenzoxazole polymer having repeating unit of formula (I), is new. A=graphene nanobelt;and n,s=30-100. An INDEPENDENT CLAIM is included for preparation of graphene nanobelt graft-modified polybenzoxazole polymer.