The invention relates to a carbon-coated ferrous sulfide negative electrode material, the preparation method and the prepared sodium ion battery thereof, Carbon-coated ferrous sulfide anode material refers to carbon-coated ferrous sulfide and its doped modified material, wherein the particle size of the ferrous sulfide is 100-500 nm, the mass of the carbon coating layer is 3-30% of the mass of theelectrode material, the doping modification elements are one or several of M=Co, Ni, Mn, Ti, Cu, Mg, Ba, Pb, Al, etc., and the mass of the doping modification elements is 0-30% of the mass of the negative electrode material. A metal sulfate and a carbon source are added into deionized water, stirred and dissolved uniformly at room temperature, freeze-dried to obtain a precursor, and calcined at high temperature in an inert atmosphere to obtain a carbon-coated ferrous sulfide negative electrode material. As that negative electrode material of the sodium ion battery, the invention has the advantage of abundant raw materials, simple preparation, short preparation period, low cost, no pollution, good rate performance and strong cycle stability, and is suitable for large-scale production.