Abstract: High iron arsenic wastewater is produced by sulfated roasting-water leaching in the smelting industry.The wastewater is highly acidic and contains massive Fe²⁺ and SO₄^2- as well as a spot of As³⁺, Cu²⁺, Zn²⁺ and Cd²⁺ ions.This article systematically introduces the technical methods, process flow and the latest research progress of the treatment for the high iron arsenic wastewater.At present, the treatment methods mainly include neutralization precipitation, sulfide precipitation, ion exchange, iron powder reduction and biological flocculation.The process route as well as the advantages and disadvantages of these methods are compared in detail.Moreover, the industrial applications of the wastewater in the preparation of inorganic polymer flocculants, magnetic nano-materials, iron oxide pigments and other products are introduced.