Polyhedral oligomeric polyhedral polycystoidosiloxane (POSS) are a kind of intermolecular organic-inorganic hybrid materials consisting both Si—O—Si cage-shaped three-dimensional inorganic structure and organic groups (Rs)bonded to silicon atoms. Since it not only has high strength and temperature resistance

but also has flexible molecular designability

it can be widely used in the modification of polymer. Reactive POSS refers to that the organic groups on POSS have high reactivity with its modified polymer

which can covalently bond polymer molecules

improve the dispersion of POSS in polymer matrix

enhance its interfacial adhesion

and improve the performance of the polymer to a greater extent. In this paper

the synthesis of reactive POSS

the progress of POSS in polymer toughening and reinforcing

heat-resistant and flame-retardant properties

dielectric properties modification are reviewed

and the progress of POSS in improving the dispersion properties of inorganic nanoparticles in polymer modification system is also summarized.