The invention discloses a neutral leaching iron removing method which comprises the following steps: feeding neutral leaching pre-solution into a first reactive tank of a multi-stage neutral leaching reactive tank, wherein all stages of neutral leaching reactive tanks are sequentially connected through a pipeline and are sequentially arrayed from high to low to realize overflow of ore pulp in the tanks; at the same time, feeding mixed gas of compressed air and oxygen in the neutral leaching reactive tank; realizing iron removing during the neutral leaching process through reaction in the multi-stage neutral leaching reactive tank. The neutral leaching iron removing method has the following beneficial effects: 1, enriched oxygen is fed in the neutral leaching reactive tank to remove iron, an oxidation liquid preparation procedure is eliminated on the basis of the original technology, and adding of manganese powder (pyrolusite) is also eliminated, so that manganese ions of a system are reduced; 2, oxygen and compressed air are adopted to replace manganese powder, and adding of potassium permanganate is also eliminated, so that the iron removal cost is greatly reduced; and 3, the neutral leaching iron removing method is suitable for neutral leaching iron removing of roasting ore containing 1% of insoluble sulphur, and the situation that content of iron in middle-supernatant is equal to or less than 10 mg/L is ensured.