Synergy, as a main guiding theory in research of highly efficient flame retardant, has been used to improve the flame retardant efficiency of polymer material. And the research of highly efficient organic synergistic flame retardants containing phosphorus is a hot topic in recent research of flame retardants. An overview of the progress in the last decade on the research of various new organic synergistic flame retardants is presented, including phosphorus-halogen, phosphorus-nitro-gen and phosphorus-silicon. The prospects of ...