The treatment of heavy metals and arsenic-containing wastewater is a global challenge, lacking effective treatment technologies. Although biological methods, electrolysis, coagulation, adsorption, reverse osmosis, etc., can achieve certain treatment effects, they suffer from high treatment costs, high energy consumption, difficult operation, and the potential for secondary pollution, making them unacceptably by enterprises. This project aims to address the challenges of high treatment costs and difficulty in achieving discharge standards for mixed heavy metal wastewater. Based on the core-shell structure theory of nanoiron (nZVI), it synthesizes an economically efficient, highly active iron-based material that synergistically removes multiple metals from wastewater, namely structurally hydroxylated reactive ferrous (SRF). It has a specific surface area and interfacial reactivity more than 10,000 times greater than traditional materials. It possesses the reactivity of nanoiron but overcomes its expensive cost, providing a highly efficient net capture function for heavy metal ions in wastewater. However, it avoids surface passivation. The reunion brings about problems such as reduced nZVI activity, increased particle size, and low reaction efficiency. SRF is a non-toxic, harmless, and pollution-free green reagent that can remove heavy metal ions and arsenic from water simultaneously through adsorption, reduction, and co-precipitation methods. It has a wide pH range of application, produces less sludge, and is cost-effective. It can be widely used for the treatment of various heavy metal industrial wastewater (such as heavy metal wastewater generated in metallurgy, electroplating, chemical industry, circuit boards, leather industries), and is conducive to the realization of metal resource utilization, with good market prospects.