▎ 摘　　要

NOVELTY - Preparing graphene-elastomeric polyester in situ polymerization composition functional fiber, comprises (i) subjecting graphene in the process of in situ polymerization into the polyester polymerization system, through the polymerization into the polyester fiber matrix, and then through the cast belt, pelletizing, to obtain graphene-polyester in situ polymerization composition sections; and (ii) drying graphene-polyester in situ polymerization composition sections, and performing melt spinning. USE - The method is useful for preparing graphene-elastomeric polyester in situ polymerization composition functional fiber (claimed). ADVANTAGE - The method enhances intensity of the polytrimethylene terephthalate, polybutylene terephthalate polyester fiber, and has good elasticity and elongation at break for lifting and gives to polyester fiber in more functional characteristics.