Method for reutilization of wastewater of process of producing rare earth chloride by extraction and transformation of sulfuric acid system

The invention relates to a method for reutilization of wastewater of a process of producing rare earth chloride by extraction and transformation of a sulfuric acid system, which contains extraction raffinate obtained by adopting a non-saponified extractant for carrying out the extraction and the transformation on rare earth sulfate solution, and the recovery steps of the extraction raffinate comprises the following steps: adding a neutralizer which is well prepared in advance in the extraction raffinate at normal temperature, neutralizing till the pH is 3.5-6.5, aging for 6-8h after the pH value is stable, filtering and finally obtaining reclaimed water for reuse. The method realizes the reutilization of the wastewater of the process of producing the rare earth chloride and the zero discharge of the wastewater of the process. The process can avoid the discharge of ammonia nitrogen wastewater, protect the water resource environment and save a large quantity of precious water resources. Furthermore, the method