Introduction: Using phosphorus, nitrogen, and bromine as flame retardant elements, it plays a flame retardant role through gas-phase and condensation flame retardant mechanisms. It is an efficient flame retardant suitable for polypropylene, meets the UL-94 V2 combustion requirements, and can smoothly pass the IEC60695-2 hot wire test. Compared with traditional bromine based flame retardants, it has a low addition amount and does not require the addition of antimony trioxide. At the same time, it has the characteristics of no precipitation, water resistance, and non toxicity.