The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for recovering chlorine and preparing chlorine salt based on a solvent extraction and salting-out effect integrated technology. By adopting a solvent extraction method and combining the process steps of wastewater pretreatment, acidification, extraction, reverse extraction and salting-out inthe method, the extraction effect on the ultrahigh-concentration chlorine-containing wastewater is remarkable, and a feasible scheme is provided for treatment of the ultrahigh-concentration industrialchlorine-containing wastewater. In the whole process flow, the cost is reduced to the minimum, the extraction agent is recycled, the purity of the product obtained by salting out is high, the filtered solution returns to the reverse extraction process, and secondary pollution is avoided. By adding the phase modifier, the problems of low extraction rate, layering of the extraction agent and the like caused by high viscosity of the extraction agent are solved, and the extraction agent is easy to obtain, high in phase splitting speed, low in investment, low in cost, convenient to use, safe, reliable and convenient for industrialization.