The recent progress in halogen-free flame retardant ethylene propylene diene monomer (EPDM) was reviewed, including inorganic metal hydroxide flame retardant, silicon-based flame retardant, intumescent flame retardant, phosphorous flame retardant, phosphorus-nitrogen synergistic flame retardant EPDM compound. The development direction of halogen-free flame retardant EPDM compound is put forward as the development of multi-functional and effective halogen-free flame retardant, preparation of polymer /nanometer composite flame retardant and development of synergistic flame retardant formulation.