Graphene polyester composite fiber combines single-layer graphene oxide with pet polymerization process. By adjusting graphene parameters and polymerization process, graphene can still be monolayer dispersed in composite polyester fiber.This new composite fiber has many functions such as far-infrared emission, anti-bacterial and anti mite, anti ultraviolet, negative ion emission, etc. it has been certified by a number of domestic and foreign authoritative testing institutions to protect health.