▎ 摘　　要

NOVELTY - Preparing graphene conductive composite fiber comprises (i) soaking hemp fiber in pectinase solution at room temperature, then immersing treated hemp fiber in chitosan aqueous solution, soaking, dehydrating and drying, and (ii) immersing hemp fiber obtained in step (i) in a graphene dispersion liquid and then drying in an oven to obtain final product, where graphene dispersion is a mixture of carboxylated graphene and N,N-dimethylformyl; and ratio between carboxylated graphene and N,N-dimethylformyl is 100:50-100 mg/ml. USE - The method is useful for preparing graphene conductive composite fiber (claimed). ADVANTAGE - The graphene conductive composite fiber improves strength and toughness of the hemp fiber, and then subjecting hemp fiber to a biological enzyme modification treatment to improve dyeing effect of the composite fiber.