In the present review article current developments on hexachlorocyclotriphosphazene (HCCP) based epoxy resins as reactive fame retardants is surveyed. The cyclotriphosphazene in its monomeric and polymeric forms behave as fame retardants due to the presence of phosphorus (P) and nitrogen (N) atoms. Usually hexachorocyclotriphosphazene based epoxy resins show reasonably low thermal and fre retardant properties therefore some external additives are being added to improved their thermal and fre retardant properties. Present review article describes the collection of previous works published on the fame retardant properties of hexachlorocyclotriphosphazene based epoxy resins. Present article also deals with the surface modifcation, functionalization and description of various hexachlorocyclotriphosphazene based epoxy resins as thermal and fame retardants