It is glycidyl methacrylate (GMA) grafting POE series compatible toughening agent, with high grafting rate, low odor and other characteristics, used for PBT, PET and other polyester materials toughening agent and glass fiber reinforcement system compatible toughening agent, not only has excellent high and low temperature toughness, the comprehensive mechanical properties of the product is also improved, and for glass fiber reinforcement system can improve the exposure of glass fiber.