Introduction: A new type of phosphorus and nitrogen halogen-free flame retardant used for polyolefins, integrating acid source, carbon source, and gas source, achieving flame retardant effect through expansion, carbonization, and insulation mechanisms. Free of halogen and heavy metal elements, flame retardant products have characteristics such as low density and low smoke emission, and can smoothly pass UL94 VO level and hot wire IEC60695-2 standard tests.