A method for fast and electrically depositing foamed irons with low-energy consumption relates to a preparation method for the foamed irons. The invention solves the problem of high power consumption in the current foamed iron preparing technology and that problems that the foamed irons manufactured by the existing foamed iron liquid have burrs, are rough, loosen, have remarkably increased brittleness and are not beneficial to wind. The preparation method of the invention include: 1, obtaining a conductive sponge after carrying out physical vapour deposition on metals on the surface of a sponge skeleton, then coating black lead conductive glue on the surface of the conductive sponge; 2, putting the conductive sponge into plating liquid for electric deposition, rinsing and dipping into sodium carbonate liquid, rinsing and then drying; 3, sintering; 4, carrying out reductive heat treatment to obtain the foamed iron. The method of the invention has the advantages of low energy consumption, environment protection, high manufacture efficiency, low cost, dense plating layer, good flexibility and easy winding. The iron content of the foamed iron prepared by the invention is over 99 percent; the surface density is 300 to 1500g/m<2>, the aperture is 30 to 110 PPI, the hole rate is more than or equal to 90 percent, the thickness is 1 to 10mm, the longitudinal tensile strength is more than or equal to 1.0N/mm<2>, the transverse tensile strength is 1.0N/mm<2> and the winding property is more than or equal to Phi 30mm.