The invention discloses a method for recycling iron in an iron-containing olivine material through mechanical ball grinding leaching. The method comprises the steps that after the iron-containing olivine material is crushed and sieved, the iron-containing olivine material and hydrogen peroxide are subjected to mixed ball grinding to obtain a magnetic iron oxide containing product, magnetic separating is carried out, magnetic iron concentrates can be obtained, and the non-magnetic part is tailing gangue. According to the method, iron resources which cannot be reused in fayalite metallurgy wasteresidues are directionally adjusted and controlled to be converted into the recyclable iron concentrates; reduction and secondary recycling of the metallurgy waste residues are achieved; the problemsabout waste residue tail end development, domestic high-grade iron ore resource starvation and environment pollution are solved; and a green sustainable development road is opened up for treatment ofwaste residues in the metallurgical industry.