The invention relates to preparation of an ultra-fine grain bulk metal material, in particular to ultra-fine grain nickel with submicron-scale double-peak distribution and a preparation method for the ultra-fine grain nickel and aims at solving the technical problem of providing a submicron-scale double-peak ultra-fine grain nickel material with good matching of strength and plasticity and simpleness in preparation process. The preparation method comprises the following steps of utilizing a direct-current electrodeposition technology, wherein Ni2SO4, NiCl2, H3BO3 and a wetting agent solution are adopted as the electrolyte; and adding a deionized water solution, wherein a pH value of the solution is 3.5-4.5, an electrochemical deposition anode is a pure nickel plate, and an electrochemical deposition cathode is a stainless steel sheet or a copper sheet. According to the preparation method, electrochemical deposition parameters are that during direct-current electrodeposition, the current density is 0.1-5A/dm<2>, the distance between the cathode and the anode is 4-8cm, the ratio of the area of the cathode to that of the anode is (3-6):2, the temperature of the electrolyte is 45-55 DEG C, and a magnetic stirring or inert gas stirring manner is adopted in the electrolytic process.