Abstract: On the basis of structure and characteristics of nano-Sb₂O₃, research development in the surface modification of nano-Sb₂O₃ and its dispersion method in resin matrix were reviewed in this paper, including the using of masterbatch, surfactants and coupling agents, in situ polymerization. The dimension effect of Sb₂O₃ was explored. The synergistic effect between nano-Sb₂O₃ and halogen-containing and halogen-free flame retardants in polymeric materials was introduced. The development significance and direction about nano-Sb₂O₃ were finally summarized

Key words: nanometric antimony trioxide; , synergistic flame retardancy; , surface modification；application