This paper deals with the preparation of paraffin/high density polyethylene (HDPE)/intumescent flame retardant (IFR)/iron as flame retardant shape-stabilized phase change material (FSPCM). The influences of iron for FSPCM on morphology, flammability property, latent heat and thermal conductive property were characterized by scanning electron microscopy (SEM), cone Calorimeter, differential scanning calorimetry (DSC) and hot disk thermal constants analyser. It Was found that iron Could be well dispersed into the composite formed by HDPE and paraffin; the flame retardant efficiency of IFR could be improved by adding iron: the thermal conductivity of FSPCM could be increased clue to the high thermal conductivity of iron. At the same time, the possible flame retardant mechanism for paraffin/HDPE/IFR with iron as a FSPCM was proposed. (C) 2009 Elsevier B.V. All rights reserved.