The invention relates to an iron-copper combination material and a preparation method thereof, belonging to the technical field of materials. The iron-copper combination material is combined from two metals (iron alloy and copper alloy), wherein the junction of the two metals is in an atomic combination form. The preparation method comprises the following steps: (1) processing the iron alloy into an iron drum; (2) preparing a copper alloy raw material a carbon material; (3) putting the copper alloy raw material and carbon material into the iron drum, welding an iron cover on the iron drum, putting in a heating furnace, and heating to form a melt; (4) centrifuging in a centrifugal machine until all the melt is solidified into the copper alloy, and cooling in casting sand to normal temperature; (5) cutting in the direction perpendicular to the axial line to obtain a bimetal disk; and (6) rolling to obtain an annular bimetal sheet. The iron-copper combination material can be used in the fields of bridge welding of heterogeneous metals, nuclear power station high-temperature automatic protection, unmanned automatic control devices, microgravity electric rotor connecting pieces and the like.