Abstract: This paper overviewed flameretardant modification methods for polyesters, which focused on the copolymerization, blending and postprocessing methods for flameretardant modification, and also introduced some new modification technologies. Furthermore, 2carboxyethyl(phenylphosphinic) acid (CEPPA) as a representative phosphoruscontaining flame retardant used for polyesters was introduced in detail, and future development direction of flameretardant polyesters was proposed. It should be pointed out that low toxicity, low smoke and halogenfree flame retardants for polyesters are the current direction in development, but the development of new types of halogenfree flame retardants will be a future trend.