An Iron-based composite material was prepared by microemulsion method. The effects of reaction temperature and usage amount of hexadecyl trimethyl ammonium bromide (CTAB) on the electrochemical properties of the product were studied. The results showed that the electrode material gave the best capacitance performance with the reaction temperature at 140 ℃ and the amount of CTAB being 1.5 g. The specific capacitances were 202.5 F/g, 123.0 F/g and 78.0 F/g at the current densities of 1 A/g, 2 A/g, and 5 A/g, respectively.