The invention discloses a method for recovering iron from sulphuric acid leachate through extraction. The sulphuric acid leachate contains greater than 14g/L of iron and 0.3-4.0mol/L of free acids, and has a pH value of less than 0.5. The method is characterized by comprising the following steps of: adding an oxidant to oxidize divalent iron in the sulphuric acid leachate; extracting the sulphuric acid leachate by an extractant to obtain deacidified raffinate; extracting iron from the deacidified raffinate by using the extractant; extracting the previous raffinate by the extractant, repeating for 2-5 times in this way, and mixing iron-loaded organic phases; re-extracting the mixed iron-loaded organic phase by using a sulphuric acid solution to obtain iron sulphate solution and an organic phase; mixing an acid-loaded organic phase and the organic phase, neutralizing acid by a basic solution, and recycling the extractant. The invention discloses a method for recovering iron, which is low in cost, simple in process and operation and environment-friendly and can be put into industrialization.